It is not simple to do that with TurboTax because yiu must purchase the 2019 CD/download software and install in a Mac or Windows computer. Then create an exact duplicate tax return as it was filed. Print that for filing to fool TurboTax to think you filed a paper return. Then you can amend and add the missing W-2, print and mail the 1040X and any other form that changed with a copy of the W-2.
It is usually easier and cheaper to go back to where it was filed since they already have the original return to start from.
**Disclaimer: This post is for discussion purposes only and is NOT tax advice. The author takes no responsibility for the accuracy of any information in this post.**
