What's new for T1 Internet version 26.21?

The latest DT Max program update is now available for downloading. It features the T1/TP-1 program for the tax years 2011 to 2022 inclusively and fully supports T1/TP-1 EFILE. Installing this version will update your version of DT Max to 26.21.

Please note that all program versions are available on the Internet.

In this version...

DT Max T1

1. Known issue fixed in version 26.21

DT Max T1

1. Known issue fixed in version 26.21

   Error code C0424T regarding the tax credit for a labour-sponsored fund on Quebec line 424