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                                  UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                              Washington, DC 20549

                                 ---------------

                                FORM 10-K/A NO. 2
(Mark One)

|X|   ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE
            SECURITIES EXCHANGE ACT OF 1934

                    For the fiscal year ended March 31, 2005
                                       or

|_|   TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE
            SECURITIES EXCHANGE ACT OF 1934

         For the transition period from ______________ to ______________

                         Commission file number: 0-13801

                              Quality Systems, Inc.
             (Exact name of Registrant as specified in its charter)

              California                            95-2888568
 (State or other jurisdiction of        (I.R.S. Employer Identification No.)
  incorporation or organization)

          18191 Von Karman Avenue, Suite 450, Irvine, California 92603
          (Address of principal executive offices, including zip code)

                                 (949) 255-2600
              (Registrant's telephone number, including area code)

           Securities registered pursuant to Section 12(b) of the Act:

            None                                         None
    (Title of each class)            (Name of each exchange on which registered)

           Securities registered pursuant to Section 12(g) of the Act:

                     Common Stock, par value $.01 per Share
                                (Title of class)

      Indicate by check mark  whether the  Registrant  (1) has filed all reports
required to be filed by Section 13 or 15(d) of the  Securities  Exchange  Act of
1934  during  the  preceding  12 months  (or for such  shorter  period  that the
Registrant was required to file such reports),  and (2) has been subject to such
filing requirements for the past 90 days. Yes |X| No |_|

      Indicate by check mark if disclosure of delinquent filers pursuant to Item
405 of Regulation S-K is not contained herein, and will not be contained, to the
best of Registrant's  knowledge,  in definitive proxy or information  statements
incorporated by reference in Part III of this Form 10-K or any amendment to this
Form 10-K. |_|

      Indicate by check mark whether the Registrant is an accelerated  filer (as
defined in Rule 12b-2 of the Act). Yes |X| No |_|

      The aggregate market value of the voting stock held by  non-affiliates  of
the  Registrant  as of September  30, 2004:  $210,543,000  (based on the closing
sales price of the Registrant's  Common Stock as reported in the NASDAQ National
Market System on that date, $50.51 per share).*

      The aggregate market value of the voting stock held by  non-affiliates  of
the  Registrant  as of June 3, 2005:  $415,011,000  (based on the closing  sales
price of the Registrant's Common Stock as reported in the NASDAQ National Market
System on that date, $51.30 per share).*




*For  purposes of this  report,  in addition  to those  shareholders  which fall
within the  definition of  "affiliates"  under Rule 405 of the Securities Act of
1933,  as  amended,  holders of ten percent or more of the  Registrant's  Common
Stock are deemed to be affiliates.

      Indicate  the  number of shares  outstanding  of each of the  Registrant's
classes of Common Stock, as of the latest practicable date.

        Common Stock, $.01 par value                      13,115,360
        ----------------------------            -----------------------------
                   (Class)                      (Outstanding at June 8, 2005)

                       DOCUMENTS INCORPORATED BY REFERENCE

      None.

                                EXPLANATORY NOTE

      This   Amendment  No.  2  to  Form  10-K  is  being  filed  to  correct  a
typographical  error  contained on the signature  page and power of attorney for
the initial  filing of the  Registrant's  Form 10-K.  As originally  filed,  the
signature  page and the  power  of  attorney  contained  on the  signature  page
inadvertently  included the conformed signature of Mr. Ahmed Hussein, one of the
members of the  Registrant's  board of directors.  However,  Mr. Hussein did not
sign the Form 10-K or power of attorney.

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                                INDEX TO EXHIBITS

EXHIBIT
NUMBER                             EXHIBIT
- ------                             -------

   3.1         Articles of Incorporation of the Company, as amended,  are hereby
               incorporated by reference to Exhibit 3.1 to the Company's  Annual
               Report on Form 10-K for the year ended March 31,  1984,  File No.
               2-80056.

   3.1.1       Amendment to Articles of Incorporation,  effective March 4, 2005.
               **

   3.2         Bylaws of the Company, as amended and restated. **

   3.3         Certificate  of  Amendment  of  Bylaws of the  Company  is hereby
               incorporated  by  reference  to  Exhibit  3.2.1 to the  Company's
               Registration Statement on Form S-1, File No. 333-00161.

   3.4         Text of  Sections  2 and 3 of  Article  II of the  Bylaws  of the
               Company is hereby  incorporated  By reference to Exhibit 3.2.2 to
               the  Company's  Quarterly  report on Form  10-QSB  for the period
               Ended December 31, 1996, File No. 0-13801.

   3.5         Certificate  of  Amendment  of Bylaws of the  Company,  is hereby
               incorporated  by  reference  to  Exhibit  3.2.3 to the  Company's
               Annual  Report on Form 10-K for the year  ended  March 31,  2000,
               File No. 0-13801.

   10.2*       1989  Incentive  Stock  Option  Plan is  hereby  incorporated  by
               reference to Exhibit 4.1 to the Company's  Registration Statement
               on Form S-8, File No. 33-31949.

   10.2.1*     Form of Incentive Stock Option  Agreement is hereby  incorporated
               by  reference  to  Exhibit  10.2  to the  Company's  Registration
               Statement on Form S-1, File No. 333-00161.

   10.2.2*     Form  of   Non-Qualified   Stock   Option   Agreement  is  hereby
               incorporated  by  reference  to  Exhibit  10.3  to the  Company's
               Registration Statement on Form S-1, File No. 333-00161.

   10.3*       Form of Incentive Stock Option  Agreement is hereby  incorporated
               by  reference  to  Exhibit  10.2  to the  Company's  Registration
               Statement on Form S-1, File No. 2-80056.

   10.4*       1993  Deferred   Compensation  Plan  is  hereby  incorporated  by
               reference to Exhibit 10.5 to the Company's  Annual Report on Form
               10-KSB for the year ended March 31, 1994, File No. 0-13801.

   10.4.2*     Profit  Sharing  and  Retirement  Plan,  as  amended,  is  hereby
               incorporated  by  reference  to Exhibit  10.4.2 to the  Company's
               Annual  Report on Form 10-KSB for the year ended March 31,  1994,
               File No. 0-13801.


                                       3


EXHIBIT
NUMBER                             EXHIBIT
- ------                             -------

   10.4.3*     Profit Sharing and Retirement Plan, as amended, amendments No. 2
               and 3, are hereby incorporated by reference to Exhibit 10.4.3 to
               the Company's Annual Report on Form 10-KSB for the year ended
               March 31, 1996, File No. 0-13801.

   10.5        Series "A"  Convertible  Preferred Stock Purchase  Agreement,  as
               amended,  dated April 21, 1995  between the Company and  Clinitec
               International,  Inc.,  is hereby  incorporated  by  reference  to
               Exhibit 10.11 to the  Company's  Annual Report on Form 10-KSB for
               the year ended March 31, 1995, File No. 0-13801.

   10.6        Form of  Indemnification  Agreement  is  hereby  incorporated  by
               reference  to  Exhibit  10.10  to  the   Company's   Registration
               Statement on Form S-1, File No. 333-00161.

   10.6.1*     Form of  Indemnification  Agreement  for  directors and executive
               officers authorized January 27, 2005. **

   10.7        Agreement  and Plan of Merger,  dated May 16, 1996,  by and among
               Quality  Systems,  Inc., CII  Acquisition  Corporation,  Clinitec
               International,   Inc.  and  certain   shareholders   of  Clinitec
               International,  Inc. and certain exhibits are hereby incorporated
               by reference to Exhibit 2 to the Company's Current Report on Form
               8-K, dated May 17, 1996 and filed May 30, 1996.

   10.8        Asset  Purchase  Agreement,  dated  May 15,  1997,  by and  among
               NextGen Healthcare  Information  Systems,  Inc., MHIS Acquisition
               Corp., Quality Systems, Inc., and certain shareholders of NextGen
               Healthcare  Information  Systems,  Inc. is hereby incorporated by
               reference to Exhibit 2 of Company's  Current  Report on Form 8-K,
               dated May 15, 1997 and filed May 29, 1997, File No. 0-13801.

   10.9*       1998 Employee Stock  Contribution Plan is hereby  incorporated by
               reference to Exhibit 4.1 to the Company's  Registration Statement
               on Form S-8, File No. 333-63131.

   10.10*      1998 Stock  Option Plan is hereby  incorporated  by  reference to
               Exhibit 4.1 to the Company's  Registration Statement on Form S-8,
               File No. 333-67115.

   10.10.1*    Amended and Restated 1998 Stock Option Plan. **

   10.11*      Memorandum   of   Understanding   regarding  the  April  3,  2000
               resignation  of Sheldon Razin  between  Sheldon Razin and Quality
               Systems,  Inc.,  is hereby  incorporated  by reference to Exhibit
               10.16 to the  Company's  Annual  Report on Form 10-K for the year
               ended March 31, 2000, File No. 0-13801.

   10.12*      Memorandum  of  Understanding  Relating to  Director  Nominees is
               hereby  incorporated by reference to Company's  Definitive  Proxy
               Statement for the Company's 1999 Shareholder's  Meeting, File No.
               001-12537.


   4


EXHIBIT
NUMBER                             EXHIBIT
- ------                             -------

   10.13*      Employment Agreement dated July 20, 2000 between Quality Systems,
               Inc.  and Lou  Silverman is hereby  incorporated  by reference to
               Exhibit 10.18 to the Company's  Quarterly Report on Form 10-Q for
               the quarter ended September 30, 2000, File No. 0-13801.

   10.14       Lease  Agreement  between  Company and Tower  Place,  L.P.  dated
               November  15,  2000,   commencing  February  5,  2001  is  hereby
               incorporated  by  reference  to  Exhibit  10.14 to the  Company's
               Annual  Report on Form 10-K for the year  ended  March 31,  2001,
               File No. 0-13801.

   10.15       Lease Agreement  between  Company and Orangewood  Business Center
               Inc.  dated April 3, 2000,  amended  February 22, 2001, is hereby
               incorporated  by  reference  to  Exhibit  10.15 to the  Company's
               Annual  Report on Form 10-K for the year  ended  March 31,  2001,
               File No. 0-13801.

   10.16       Lease Agreement between Company and Craig Development Corporation
               dated  February 20, 2001 is hereby  incorporated  by reference to
               Exhibit 10.16 to the Company's Annual Report on Form 10-K for the
               year ended March 31, 2001, File No. 0-13801.

   10.17       Sublease  Agreement  between Company and Infinium  Software dated
               February 22, 2002 is hereby  incorporated by reference to Exhibit
               10.17 to the  Company's  Annual  Report on Form 10-K for the year
               ended March 31, 2003, File No. 0-13801.

   10.18       Lease Agreement  between Company and HUB Properties LLC dated May
               8, 2002 is hereby  incorporated  by reference to Exhibit 10.18 to
               the Company's Annual Report on Form 10-K for the year ended March
               31, 2003, File No. 0-13801.

   10.19       Lease Agreement  between the Company and LakeShore Towers Limited
               Partnership  Phase IV, a California  limited  partnership,  dated
               September 15, 2004. **

   10.20*      Board Service  Agreement between the Company and Lou Silverman is
               incorporated by reference to Exhibit 10.2.1 to our Current Report
               of Form 8-K, dated May 31, 2005, File No. 001-12537.

   10.21*      Board Service  Agreement between the Company and Patrick Cline is
               incorporated  by  reference  to Exhibit  10.2.1 to the  Company's
               Current  Report  of Form  8-K,  dated  May  31,  2005,  File  No.
               001-12537.

   21          List of Subsidiaries****

   23.1        Consent of Independent Registered Public Accounting Firm - Grant
               Thornton LLP**


                                       5


EXHIBIT
NUMBER                             EXHIBIT
- ------                             -------

   24          Power of Attorney *****

   31.1        Certification  of  Chief  Executive   Officer  Required  by  Rule
               13a-14(a) of the Securities  Exchange Act of 1934, as amended, as
               Adopted Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002
               ***

   31.2        Certification  of  Chief  Financial   Officer  Required  by  Rule
               13a-14(a) of the Securities  Exchange Act of 1934, as amended, as
               Adopted Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002
               ***

   32.1        Certification  of Chief  Executive  Officer  and Chief  Financial
               Officer  Pursuant to 18 U.S.C.  Section 1350, as Adopted Pursuant
               to Section 906 of the Sarbanes-Oxley Act of 2002. **

   *           This exhibit is a management  contract or a compensatory  plan or
               arrangement.

   **          Filed as an  exhibit  to the  initial  filing of this  Report and
               incorporated herein by reference.

   ***         Filed herewith.

   ****        Filed as an exhibit to Amendment No. 1 to this Report.

   *****       Contained  on the  signature  page to the initial  filing of this
               Report, and corrected via the Explanatory Note on the facing page
               of this Form 10-K/A No. 2.


                                       6


                                   SIGNATURES

      Pursuant  to the  requirements  of Section  13 or 15(d) of the  Securities
Exchange Act of 1934,  the  registrant has duly caused this Form 10-K/A No. 2 to
be signed on its behalf by the undersigned, thereunto duly authorized.


                                      By: /s/ LOUIS E. SILVERMAN
                                      --------------------------
                                      Louis E. Silverman,
                                      President and Chief Executive Officer

Date: August 19, 2005

      Pursuant to the  requirement of the Securities  Exchange Act of 1934, this
Form  10-K/A  No. 2 has been  signed by the  following  persons on behalf of the
registrant and in the capacities and on the dates indicated.



Signature                            Title                                           Date
- -----------------------------        ----------------------------------------        ---------------
                                                                               
/s/ SHELDON RAZIN*                   Chairman of the Board                           August 19, 2005
- -----------------------------
Sheldon Razin

/s/ LOUIS E. SILVERMAN               Director, President and Chief Executive
- -----------------------------        Officer (Principal Executive
Louis E. Silverman                   Officer)/Director                               August 19, 2005

/s/ PATRICK CLINE*                   Director, President, NextGen Healthcare
- -----------------------------        Information Systems Division                    August 19, 2005
Patrick Cline

/s/ PAUL HOLT                        Secretary and Chief Financial Officer
- -----------------------------        (Principal Financial Officer)                   August 19, 2005
Paul Holt

/s/ WILLIAM BOTTS*                   Director                                        August 19, 2005
- -----------------------------
William Botts

/s/ MAURICE DEWALD*                  Director                                        August 19, 2005
- -----------------------------
Maurice DeWald

- -----------------------------        Director                                        August 19, 2005
Ahmed Hussein

/s/ JONATHAN JAVITT*                 Director                                        August 19, 2005
- -----------------------------
Jonathan Javitt

/s/ VINCENT LOVE*                    Director                                        August 19, 2005
- -----------------------------
Vincent Love

/s/ STEVEN PLOCHOCKI*                Director                                        August 19, 2005
- -----------------------------
Steven Plochocki

*By: /S/ LOUIS E. SILVERMAN
     ------------------------
     Louis E. Silverman,
     Attorney-In-Fact



                                       7


               INDEX TO EXHIBITS FILED WITH THIS FORM 10-K/A NO. 2

EXHIBIT
NUMBER                 EXHIBIT
- ------                 -------

31.1     Certification of Chief Executive  Officer Required by Rule 13a-14(a) of
         the Securities Exchange Act of 1934, as amended, as Adopted Pursuant to
         Section 302 of the Sarbanes-Oxley Act of 2002.

31.2     Certification of Chief Financial  Officer Required by Rule 13a-14(a) of
         the Securities Exchange Act of 1934, as amended, as Adopted Pursuant to
         Section 302 of the Sarbanes-Oxley Act of 2002.


                                       8