BOSTON FINANCIAL QUALIFIED HOUSING TAX CREDITS L.P. IV
                                   (A Limited Partnership)
                                            EXHIBIT 32.1


                          CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350,
                             AS ADOPTED PURSUANT TO SECTION 906 OF THE
                                  SARBANES-OXLEY ACT OF 2002


In connection with the Quarterly Report of Boston Financial  Qualified  Housing
Tax Credits L.P. IV (the  "Partnership") on Form 10-QSB for the period  ended
June 30, 2007 as filed with the  Securities  and  Exchange  Commission  on the
date hereof  (the  "Report"),  the undersigned,  the Principal Executive Officer
and Principal Financial Officer,  hereby certifies pursuant to 18 U.S.C. Section
1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that

1.the Report fully complies with the requirements of Section 13(a) or 15(d) of
  the Securities Exchange Act of 1934; and

2.the information  contained in the Report fairly presents,  in all material
  respects,  the financial  condition and results of operations of the
  Partnership.



                                       /s/Gary Mentesana
                                        Gary Mentesana
                                        Principal Executive Officer and
                                        Principal Financial Officer
                                        Arch Street VIII, Inc., as
                                        Managing General Partner of
                                        Boston Financial Qualified
                                        Housing Tax Credits L.P. IV


                                                    Date:  August 14, 2007


A signed  original of this written  statement  required by section 906 has been
provided to the Partnership and will be retained by the Partnership and
furnished to the Securities and Exchange Commission or its staff upon request.