Question about Health Insurance Tax Credit

[The-old-version-was-easier]

Hi.  I had almost $29k in income last year, most of which was Social Security.  After some Capital Losses and the Standard deduction, the online version calculated my "Income" (I think taxible) at about $2300.  Oh, this included $200 in earned revenue and some interest.  No taxes were witheld on them.

I am on a Medicare Advantage Program that is an HMO.   Social Security pays them directly.  I have to pay them a few dollars each month. It shows up on the State Marketplace.

From, the tax tables., I thought I'd ow about $200, but TT calculated about $800.   I dug and dug and saw a note about the tax credit, but it didn't make sense to me.   I can't seem to find that page.

Could someone please explain why I'd be paying about 31% of my AGI?  This makes no sense to me.

[SusanY1]

It sounds like a subsidy was determined on your state marketplace plan form.  If your income varied from the amount used to determine the subsidy, this is reconciled through the health insurance premium tax credit.  I would double-check your entries in that section of the program  to be sure all three columns of data are properly completed for each month that you had the plan.

You will find this under Deductions & Credits, Medical, and then Marketplace Insurance/1095-A.