TT did not do my 2020 return and I do not have access to it. What info from that return do I need to efile 2021?

You will need the 2020 AGI from the federal tax return Form 1040 Line 11 to e-file the 2021 tax return.  If you did not file a 2020 tax return then enter a 0 (zero) for the 2020 AGI.

Go to this IRS website for free federal tax return transcripts - https://www.irs.gov/individuals/get-transcript

Thank you Champ, I will get a 2020 return transcript from the IRS