No, you can't add payments made toward your 2019 tax return for 2020. Amend your 2019 to include estimates paid for that year.
You can amend and mail your 2019 tax return as long as your original return was accepted in TurboTax Online or TurboTax CD/Download. You can’t amend a return that hasn’t been filed yet.
Select the product you're using to get started.
TurboTax Online
TurboTax CD/Download
To track the status of your amended return, use the IRS's Where's My Amended Return? tracking tool. Please note that mailed amended returns will take longer than returns that were e-filed.
Processing times for amended state returns vary from state to state. If it's been more than 12 weeks since you mailed your amended state return, and you haven't heard anything, we suggest you contact your state tax agency.
Note: E-filing 2019 amended returns is not supported at this time.
