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
December 31, 2006 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:February 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.