After you file

MAGI is defined is several ways in the tax law depending on what it is used for.

 

The Medicare calculations do  not go on a tax return so there are no IRS forms for it on a tax return.   TurboTax files a tax return and nothing else.

**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.**