ProFile users receive an EFILE error 20080 when trying to transmit a T2 return.
Resolution
This error is due to the AT1 EDI Schedule (AEDI) not being filled out or being incomplete.
The information in Part 1 of the form flows from menu option EFILE > Options > T2 AT1 Net File.
After entering this information, right-click anywhere on the schedule and select Update Third Party Service Provider Filer Information.
The information in Part 2 of the form is manually entered in (or carried forward).