During the estimated taxes, you choose if you want to create estimates based on py, or current year, 90% of current year or any number you choose. That is not TT error. If you want a safe harbor always choose what you owed the prior year and make sure the amounts withheld by your employer are accurate. Then there are years that the govt reduces withholding which could cause issues. You complete the forms. You need this flexibility as many have dramatically different annual incomes so there would be reasons to choose.
Estimated tax payment safe harbor details
The IRS will not charge you an underpayment penalty if: You pay at least 90% of the tax you owe for the current year, or 100% of the tax you owed for the previous tax year, or. You owe less than $1,000 in tax after subtracting withholdings and credits.
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**Mark the post that answers your question by clicking on "Mark as Best Answer" I am NOT an expert and you should confirm with a tax expert.
