SECTION 906 CERTIFICATION

                Certification Pursuant to 18 U.S.C. Section 1350,
                             As Adopted Pursuant to
                  Section 906 of the Sarbanes-Oxley Act of 2002

Active Assets Tax-Free Trust

      In connection with the Report on Form N-CSR (the "Report") of the
above-named issuer for the period ended December 31, 2004 that is accompanied by
this certification, the undersigned hereby certifies 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 Issuer.

Date: February 17, 2005                  /s/ Ronald E. Robison
                                         ---------------------------
                                         Ronald E. Robison
                                         Principal Executive Officer

A signed original of this written statement required by Section 906 has been
provided to Active Assets Tax-Free Trust and will be retained by Active Assets
Tax-Free Trust and furnished to the Securities and Exchange Commission or its
staff upon request.

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                            SECTION 906 CERTIFICATION

                Certification Pursuant to 18 U.S.C. Section 1350,
                             As Adopted Pursuant to
                  Section 906 of the Sarbanes-Oxley Act of 2002

Active Assets Tax-Free Trust

      In connection with the Report on Form N-CSR (the "Report") of the
above-named issuer for the period ended December 31, 2004 that is accompanied by
this certification, the undersigned hereby certifies 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 Issuer.

Date: February 17, 2005                  /s/ Francis Smith
                                         ----------------------
                                         Francis Smith
                                         Principal Financial Officer

A signed original of this written statement required by Section 906 has been
provided to Active Assets Tax-Free Trust and will be retained by Active Assets
Tax-Free Trust and furnished to the Securities and Exchange Commission or its
staff upon request.

                                       9