Where can I find my Modified Adjusted Gross Income in my turbo-tax return

[jerry2000]

MAGI for what specific purpose? There are different requirements for different purposes.

[260tellico]

To determine if I will go into a higher bracket on my Social Security medical premiums.

[jerry2000 · Accepted solution]

Turbotax does not calculate that for you, you have to calculate it. It is your adjusted gross income (Line 37, Form 1040) plus your tax-exempt interest income, Line 8b, Form 1040.

See:
https://www.ssa.gov/pubs/EN-05-10536.pdf