@boomtown You did not pay for "non-refundable e-filing." You paid to prepare a tax return. There is no extra fee to e-file. The fee for using online TurboTax is the same whether you e-file or mail it in an envelope. And....you do not have to mail 300 pages. You only mail the pages that are required by the IRS. They do not want all of those worksheets. If you select print for filing by mail it will print only the pages you need to mail in.
And...if the rejection was for AGI then before you resort to filing by mail, try again but use zero as your AGI.
Be aware that many 2020 returns took so long for the IRS to process that your 2020 AGI might not be in the IRS system. Try using zero instead.
If filing with zero is rejected then file again but select the option that you did not file last year. The IRS does not see that question and it will allow you to e-file with no AGI question.
https://ttlc.intuit.com/community/agi/help/where-do-i-correct-my-agi-in-turbotax-online/00/26311
If that does not work and you still cannot e-file, then print, sign, and mail your tax return.
https://ttlc.intuit.com/community/printing/help/how-do-i-print-and-mail-my-return-in-turbotax-online...
**Disclaimer: Every effort has been made to offer the most correct information possible. The poster disclaims any legal responsibility for the accuracy of the information that is contained in this post.**
