TIP:
If you want to efile your 2020 return, during the efiling stage it will ask you to verify it by entering the 2019 AGI. Since you didn't file the 2019 return last year in the normal time frame, when efiling your 2020 return, you would use an AGI of 0 (zero) to verify.
A 2019 return cannot be efiled. It has to be printed, signed, dated, and mailed. It's recommended to mail by a method that has tracking such as Certified or Priority Mail. If you have both Federal and state returns, you mail the Federal return to the IRS and the state tax return to the state tax agency. The state tax agency may also require a copy of the Federal return. There should be a page called Filing Instructions that prints with the returns.
