Can I e-file my 2019 amended return with TurboTax Online?

You would have to go into the 2019 TurboTax software and pull up the original return to amend the 2019 federal return.

You would have to use the 2020 TurboTax software to pull up the original filed return to amend it.

To amend your 2019 return:

1. Open the return you want to amend in your TurboTax software program.
2. Make sure your return is exactly as it was when you originally filed it.
   • If you made changes after you filed, undo them. We suggest comparing your onscreen numbers with a paper copy of your filed return.
3. Now, make an "amend" copy your return by selecting Save As (Mac: select Duplicate) from the File menu. This preserves the originally-filed return.
   •  Name the copy to distinguish it from the original, like 2019 Amended Smith B Form 1040 Return.
4. You should now be working inside the copy you'll be amending. Inside your program, search for amend and then click the Jump to link.
5. Select Continue on the We'll help you change (amend) your return screen.
6. On the following screen, Did you already file your return? select Yes, I've already filed my return and then select I need to amend my 2019 return. Select Continue and then carefully follow the instructions to amend.
   • Don't worry if your refund meter drops to 0; this is normal. Your calculations will come out correctly in the end.
7. Finish and file your amendment according to the instructions. You can e-file your 2019 amended federal tax return, but most states require amendments to be printed and filed by mail.
8. If e-filing, you’ll review, sign and transmit your federal return. If not, we'll give you instructions to print and mail your amended return.

3 weeks after mailing your amended federal return, you can start tracking it at the IRS Where's My Amended Return? site. Allow at least 16 weeks for the IRS to process your amended return.

For additional information, please refer to:

How to amend my TurboTax return