Is anything selected under Employment for employment expenses? Could you please check your tax profile for employment and related to employment expenses?

Nope, only T4 selected

I have the same issue, only a T4, I called and screen shared also, and they told me to just wait a few days and try again. I even started an entire new tax return, same error. 

@brittany1404: Did you import any information from the previous year? If so, have you tried starting a new return without using any information from the previous year?

Yes I have. Same error. 

@brittany1404 Thanks for confirming. We have checked with the assigned department as advised by the phone support; we have to wait as our team is working on certain forms. We appreciate your patience.

I have the same issue/error message.  Must be a bug they are trying to fix.

@wighty2719 we are still in a process of finalizing some forms; give it a try after a few days. We appreciate your patience.