Yes, you can amend your previous years returns for the years 2017, 2018 and 2019. You must file Form 1040-X within 3 years after the date you filed your original return. You should amend the 2017 return by April 17, 2021 to receive a refund. The other returns should be filed in a timely manner to obtain a refund for those years.
Here is how to amend a return:
In order to file 2017 correctly you need to download the desktop version of 2017 software and prepare the 2017 return again using the right software. Then you print sign and mail the 2017 return. It cannot be e-filed.
Online preparation and e-filing for 2017 is permanently closed.
To file a return for a prior tax year
If you need to prepare a return for 2017, 2018 or 2019 you can purchase and download desktop software to do it, then print, sign, and mail the return(s).
Here is a link to access prior year software.
Remember to prepare your state return as well—if you live in a state that has a state income tax.
When you mail a tax return, you need to attach any documents showing tax withheld, such as your W-2’s or any 1099’s. Use a mailing service that will track it, such as UPS or certified mail so you will know the IRS/state received the return.
Note: The desktop software you need to prepare the prior year return must be installed/downloaded to a full PC or Mac. It cannot be used on a mobile device.
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