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DT Professional Suite
Program Updates

For DT Max & DT Professional Suite Tax Software

The latest updates of our Professional Accounting Software

Click on the links below to download the latest updates.

Please note: Successful installation of the first version of a new tax year requires that your Thomson Reuters account be fully up-to-date. Installation prior to receiving your new licence key will result in loss of access to DT Max including all prior years. To avoid this problem, please ensure that you have received your new licence key by mail or by email and have it in hand before installing.

The downloads are available to licensed users of DT Max only.

If you require assistance with any download, contact Technical Support at 1-800-663-7829 or dt.support@thomsonreuters.com.

To purchase a licence, contact sales at 1 866 653-8629 or DT-sales@thomsonreuters.com. If your username and password do not enable you to sign in, please contact Dr Tax client services at (514) 733-8355 or 1(800) 663-7829.

If you do not have a prior version of DT Max already installed but wish to access previous tax years, you may download the full DT Max package.

The full package contains DT Max T1, T2, T3 and T5013 version for all years as well as the knowledge base in both languages. However, due to its large size, this package should only be downloaded by users who access the Internet using high-speed connections, as using a dial-up connection will be slow and unreliable.

DT Max T1 v27.31 *   20-Jun-24
267 Mb
DT Max T2 v27.31 *   20-Jun-24 228 Mb
DT Max T3 v27.31 *   20-Jun-24 196 Mb
DT Max T5013 v27.31*   20-Jun-24 176 Mb
DT Max T1/T2/T3/T5013 v27.31 (full package) *   20-Jun-24 1015 Mb
T1/T2/T3/T5013 demo version   Latest 577 Mb
Knowledge base update - English   Latest 314 Mb
Knowledge base update - French   Latest 318 Mb
DT Max T1 - User Guide - English   Latest 7 Mb
DT Max T1 - User Guide - French   Latest 7 Mb
DT Max T2 - User Guide - English   Latest 7 Mb
DT Max T2 - User Guide - French   Latest 7 Mb
DT Max T3 - User Guide - English   Latest 6 Mb
DT Max T3 - User Guide - French   Latest 6 Mb
DT FormMax v15.2 *   28-Mar-24 138 Mb
DT FileCabinet v23.1.0 *   11-Dec-23 410 Mb
DT Practice v2022.2.2 *   10-Jan-22 494 Mb

* The downloads with asterisks are available to licensed users of DT Max only.

Call us at 1 866 653 8629

for any inquiries about pricing for the DT Professional Suite products, or write us at