pmurphy3
Expert Alumni

Get your taxes done using TurboTax

The amount converted to a Roth IRA will be reported as ordinary income.   The amount of Federal and State taxes will be computed at the time of the preparation of the return.

However, I note that you said you did it in the 4th Quarter of the year.   You still have time to make estimated payments.   Generally , the last quarter of the year can be paid by January 15th. 

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