EXHIBIT (12)

                                HALE AND DORR LLP
                               Counsellors at Law
                  60 State Street, Boston, Massachusetts 02109
                         617-526-6000 o Fax 617-526-5000


                                                    DRAFT
                                                    November 1, 1999

Board of Trustees
Eaton Vance Investment Trust,
on behalf of Eaton Vance Connecticut
Limited Maturity Municipals Fund,
Eaton Vance Michigan Limited Maturity
Municipals Fund, and Eaton Vance
National Limited Maturity Municipals Fund
The Eaton Vance Building
255 State Street
Boston, MA 02109

Dear Members of the Board of Trustees:

         You have  requested our opinion  regarding  certain  federal income tax
consequences  described below of the acquisition by Eaton Vance National Limited
Maturity  Municipals  Fund  (the  "Acquiring  Fund"),  a series  of Eaton  Vance
Investment Trust (the "Trust"),  of all of the assets of Eaton Vance Connecticut
Limited  Maturity  Municipals  Fund and Eaton Vance  Michigan  Limited  Maturity
Municipals Fund (each of which is a separate series of the Trust and is referred
to hereinafter as an "Acquired Fund"), in exchange solely for (i) the assumption
by the  Acquiring  Fund of all of the  liabilities  of each  Acquired  Fund (the
"Acquired Fund Liabilities") and (ii) the issuance of Class A and Class B voting
shares  of  beneficial  interest  of the  Acquiring  Fund (the  "Acquiring  Fund
Shares") to each Acquired Fund,  followed by the  distribution  by each Acquired
Fund, in  liquidation of that Acquired Fund, of the Acquiring Fund Shares to the
shareholders  of that  Acquired Fund and the  termination  of that Acquired Fund
(the   foregoing   together    constituting   the   "reorganizations"   or   the
"transactions").

         In rendering  this opinion,  we have examined and relied upon the facts
stated and  representations  made in (i) the prospectus for the Acquiring  Fund,
dated August 1, 1999,  (ii) the  prospectus  for each  Acquired Fund and certain
other mutual  funds,  dated August 1, 1999,  (iii) the  statement of  additional
information for the Acquiring Fund,  dated August 1, 1999, (iv) the statement of
additional  information  for each  Acquired Fund and certain other mutual funds,
dated August 1, 1999,  (v) the Notice of Meeting of  Shareholders  Scheduled for
October 29, 1999 and the accompanying proxy statement and prospectus relating to
the transactions,  dated  ___________,  1999 (the "Proxy  Statement"),  (vi) the
memorandum,  dated August 10, 1999,  regarding the transaction  from Eaton Vance
Management  to the Board of Trustees of the Trust,  (vii) the Agreement and Plan
of Reorganization, made August 16, 1999, between

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Board of Trustees
Eaton Vance Investment Trust
November 1, 1999
Page 2


the Acquiring Fund and each Acquired Fund (the "Agreement"),  (viii) the letters
on behalf  of the  Acquiring  Fund,  each  Acquired  Fund,  Connecticut  Limited
Maturity Municipals  Portfolio,  Michigan Limited Maturity Municipals  Portfolio
and National Limited Maturity  Municipals  Portfolio  delivered to Hale and Dorr
LLP   containing   certain   representations   relevant  to  this  opinion  (the
"Representation   Letters")   and  (ix)  such  other   documents  as  we  deemed
appropriate.

         In our  examination of documents,  we have assumed the  authenticity of
original documents,  the accuracy of copies, the genuineness of signatures,  and
the legal  capacity  of  signatories.  We have  assumed  that all parties to the
Agreement have acted and will act in accordance  with the terms of the Agreement
and all other documents  relating to the  transactions and that the transactions
will be  consummated  pursuant  to the  terms  and  conditions  set forth in the
Agreement  without the waiver or  modification of any such terms and conditions.
Furthermore,   we  have  assumed  that  all  representations  contained  in  the
Agreement,  as well as those  representations  contained  in the  Representation
Letters,  are, on the date hereof,  true and complete in all material  respects,
and that any representation  made in any of the documents referred to herein "to
the best of the knowledge and belief" (or similar  qualification)  of any person
or party is correct without such qualification.  We have also assumed that as to
all  matters  for which a person or entity has  represented  that such person or
entity  is not a party  to,  does  not  have,  or is not  aware  of,  any  plan,
intention,  understanding,  or  agreement,  there  is no such  plan,  intention,
understanding,  or agreement. We have not attempted to verify independently such
representations,  but in the course of our  representation,  nothing has come to
our attention that would cause us to question the accuracy thereof.

         The conclusions  expressed herein represent our judgment  regarding the
proper treatment of certain aspects of the transactions  affecting the Acquiring
Fund, each Acquired Fund and the shareholders of each Acquired Fund on the basis
of our analysis of the Internal  Revenue Code of 1986,  as amended (the "Code"),
case law, Treasury  regulations and the rulings and other  pronouncements of the
Internal Revenue Service (the "Service") which exist at the time this opinion is
rendered. Such authorities are subject to prospective or retroactive change, and
we do not undertake  any  responsibility  to advise you of any such change.  Our
opinion  represents  our best  judgment  regarding  how a court would  decide if
presented with the issues  addressed  herein and is not binding upon the Service
or any court.  Moreover,  our  opinion  does not provide  any  assurance  that a
position taken in reliance on such opinion will not be challenged by the Service
and does not constitute any representation or warranty that such position, if so
challenged, will not be rejected by a court.

         This opinion  addresses only the specific  United States federal income
tax  consequences of the  transactions set forth below, and does not address any
other federal,  state, local, or foreign income, estate, gift, transfer,  sales,
or other tax  consequences  that may result from the  transactions  or any other
transactions.

                                     OPINION

         On the basis of and subject to the  foregoing  and in reliance upon the
representations  and  assumptions  described  above, we are of the opinion that,
with respect to each transaction:


Board of Trustees
Eaton Vance Investment Trust
November 1, 1999
Page 3


         (a) The  acquisition  by the Acquiring Fund of all of the assets of the
Acquired Fund solely in exchange for the issuance of the  Acquiring  Fund Shares
to the Acquired Fund and the assumption of all of the Acquired Fund  Liabilities
by the Acquiring  Fund,  followed by the  distribution  by the Acquired Fund, in
liquidation  of the Acquired Fund, of Acquiring Fund Shares to the Acquired Fund
shareholders  in  exchange  for  their  shares  of the  Acquired  Fund  and  the
termination of the Acquired Fund, will constitute a "reorganization"  within the
meaning of Section  368(a) of the Code. The Acquiring Fund and the Acquired Fund
will each be "a party to a reorganization"  within the meaning of Section 368(b)
of the Code.

         (b) No gain or loss will be  recognized  by the Acquired  Fund upon (i)
the transfer of all of its assets to the  Acquiring  Fund solely in exchange for
the issuance of Acquiring Fund Shares to the Acquired Fund and the assumption of
all of the  Acquired  Fund  Liabilities  by the  Acquiring  Fund  and  (ii)  the
distribution  by  the  Acquired  Fund  of  such  Acquiring  Fund  Shares  to the
shareholders of the Acquired Fund (Sections 361(a) and 361(c) of the Code).

         (c) No gain or loss will be recognized  by the Acquiring  Fund upon the
receipt of the assets of the  Acquired  Fund solely in exchange for the issuance
of Acquiring  Fund Shares to the Acquired Fund and the  assumption of all of the
Acquired Fund Liabilities by the Acquiring Fund (Section 1032(a) of the Code).

         (d) The  basis of the  assets  of the  Acquired  Fund  acquired  by the
Acquiring Fund will be, in each instance,  the same as the basis of those assets
in the hands of the Acquired  Fund  immediately  prior to the transfer  (Section
362(b) of the Code).

         (e) The tax holding  period of the assets of the  Acquired  Fund in the
hands of the Acquiring Fund will, in each instance,  include the Acquired Fund's
tax holding period for those assets (Section 1223(2) of the Code).

         (f) The  shareholders  of the Acquired Fund will not recognize  gain or
loss upon the exchange of all of their  shares of the  Acquired  Fund solely for
Acquiring  Fund  Shares as part of the  transaction  (Section  354(a)(1)  of the
Code).

         (g) The basis of the  Acquiring  Fund Shares  received by the  Acquired
Fund shareholders in the transaction will be the same as the basis of the shares
of the Acquired Fund surrendered in exchange therefor (Section  358(a)(1) of the
Code).

         (h) The tax holding  period of the  Acquiring  Fund Shares  received by
Acquired Fund shareholders will include,  for each shareholder,  the tax holding
period for the shares of the Acquired  Fund  surrendered  in exchange  therefor,
provided  that such shares of the Acquired  Fund were held as capital  assets on
the date of the exchange (Section 1223(1) of the Code).

Board of Trustees
Eaton Vance Investment Trust
November 1, 1999
Page 4


         No opinion is expressed  or implied  regarding  the federal  income tax
consequences to the Acquiring Fund,  either Acquired Fund or the shareholders of
either  Acquired  Fund  of any  conditions  existing  at the  time  of,  effects
resulting  from,  or other  aspects of the  transaction  except as expressly set
forth  above.  This  opinion may not be relied  upon except with  respect to the
consequences  specifically discussed herein nor may it be relied upon by persons
or  entities  to whom it is not  addressed,  other  than with our prior  written
consent.

                                              Very truly yours,


                                              Hale and Dorr LLP