It does not matter whether you e-filed or mailed the return. You can transfer your 2019 data to the new 2020 return at the very beginning--BEFORE you enter any other data in to 2020. If you amended, that is what will transfer in.
How to transfer last year’s return? https://ttlc.intuit.com/questions/1900883
**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.**
