I am still have the same issue as the OP and I had already tried the steps suggested.
I have $67 carryover from last year BUT NO FOREIGN TAXES PAID IN 2020. TTax appears to need to have some amount for 2020 before it allows prior years' carryover. TTax shows the carryover on line 10 of the worksheet but won't prefill any other information since I didn't have any taxes paid in 2020. I can't manually enter my income on line 18 with overriding the program, so it does not open up Schedule 3 which then carries the tax over to the 1040. I have contacted TTax phone support and they have escalated the issue as the first person couldn't figure it out either.
It also won't allow me to bypass the AMT schedules even though I don't have any AMT, and never have had any.
