Thank you. Yes, the MAGI that TT calculated was for passive gain on rental property. So- AGI plus tax-exempt interest (which I have none) = my AGI. My AGI includes 85% of my Social Security Payment , and thus I better plan for that in the future, for IRMMA planning.
I am aware of the IRMMA rate setting based on MAGI from 2 years prior tax reporting. I got my 2022 and 2023 Part B cost reduced - using the Medicare Income-Related Monthly Adjustment Amount-Life-changing Event (SSA-44) (PDF) form, and got both 2022 and 2023 IRMMA based on our 2022 income, and not 2020 and 2021 as would normally be the case.
For folks reading this, IRMMA adjustment process does work, if you can claim one of the qualified reasons.
But as I start doing IRA to Roth conversions, MAGI needs to be planned precisely (which is why I need to know for sure how MAGI for Medicare Part B is calculated)
