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I'm not sure you completely understood the problem we are having.  We are not looking at his Roth contribution to take off his Federal income tax owed.  This is strictly the Market Place Credit that the Market Place told him he would get toward the cost of the high cost of Market Place insurance.  Market place was told what his income would be for 2024 (which is the same as what we are in putting into TT.  There is no estimating/actual figures differences).  So since MP was offering to increase his credit toward their expensive insurance by contributing to a Roth (and yet it said Roth), I'm thinking TT is not taking that into account.  There was a calculator on the MP website where you could see what your credit would be based on how much you would put in each month.  We tried a couple differing amounts and weighed the choices based on how much credit it offered based on the differing amounts and how much he thought he could live without by putting money into the Roth.  So since the info was completely accurate that was entered into MP (and is no different that the amount he made being entered into TT), why is TT taking priority over MP credits given?  Where can we see TT's calculations on this?  TT does make errors as it did not offer or suggest a specific form for us last year  when we did a Traditional to Roth conversion in December 2023 to show that our high income did not come from the entire year.  And even though we paid the tax on the conversion in the same quarter it was done, TT cost us a $160 penalty for not paying estimated taxes ALL YEAR in anticipation of doing a conversion at the very END of the year.  So I really want to see how TT is saying they are correct this time and MP was wrong.