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@elgato81 if you set the withholdings high enough IN DECEMBER, that would avoid the under-payment penalty.   The way the form works, the IRS gives you credit for the withholdings (but not the estimated payments) as if they occured evenly over the course of the year. 

The tax liability (line 24 for 2025 which you would have to estimate since you don't know that yet ) less the withholding would need to be less than $1000 remaining to be paid.