TurboTax is giving some options to try... such as using a PIN instead of previous year AGI, or other remedies. TurboTax is also stating that some problems are internal to either IRS, Fed gov, or State and may not be able to be fixed. So a last resort option is to paper file your tax return.
Many people keep entering the correct 2019 AGI and E-filing, but it keeps getting rejected. It won't hurt to keep trying many times to indirectly reset the glitch (if it is a glitch). Fix your return on TurboTax. Or go to Review. Enter your identifying info such as your 2019 AGI or Identification. Enter an intentional wrong number such as $0.00 AGI. E-file. The tax return is rejected usually within 12 hours. Go back into TurboTax and Fix or go to Review. Now enter the correct information, such as your correct 2019 AGI. Now E-FILE your tax return. IRS accepts your tax return. It doesn't make much sense, but some people have reported success basically by intentionally creating a new IRS reject code or the same reject code but with a different value entered in and fixing it again. Keep trying something different. It doesn't hurt to have your tax return rejected 10 times. It only takes a day or so to try many times. Maybe later an update will fix the numerous issues with 2020 tax software. Last resort is paper file
