The problem is - THERE IS NO CODE!
I only get the following message from the Intuit email:
/Return/ ReturnData /IRS1040ScheduleC/ ReturnsAndAllowancesAmt - Data in the return is missing or invalid. Please double check your entries.
I've looked over my 2020 1040 schedule C and compared it to 2019 and I can find no incorrect entries. It would be helpful if there was some code to point to the problem, but the above message is all I have to go by.
What should I be looking at / for?
