You'll have to do this on a computer or laptop, as it involves installing the TurboTax download software. You won't be able to do this on a mobile device.
- Sign in at TurboTax.com with the login you used when you filed your 2016 return.
- Select Show to open Your tax returns documents.
- Select 2016, and then select Amend (change) 2016 return.
- In the expanded instructions, select the links in step 1 (download your .tax file) and step 2 (download TurboTax Desktop 2016 for Windows).
- Using a Mac? Complete this online form to request the 2016 TurboTax Amendment software for the Mac.
- Install the TurboTax 2016 software.
- Now, open your .tax file in the TurboTax 2016 software by choosing File and Open Tax Return (Windows) or TurboTax and Open Tax Return (Mac). Browse to the location of your tax file, and then select Open.
- You're ready to amend your 2016 return. Follow these instructions.