How can I get my 2016 return amended?

[mesquitebean]

See this FAQ and choose your situation; i.e., Online TurboTax or desktop software.

FAQ:  How do I amend a 2016 return?
https://ttlc.intuit.com/community/amending/help/how-do-i-amend-a-return-in-turbotax/00/26768

If you prepared the 2016 return online and currently use Windows, you can download free 2016 "Amend Software" for Windows.

If you use a Mac, you can get the complimentary 2016 Mac program.

The FAQ will lead you to instructions for getting the online tax data file and the software.