Assuming you are trying to adjust your federal W-4 form so that you don't owe taxes when you file your income tax return, the best way to hone in on a precise number for withholding is to use the IRS Tax Withholding Estimator at the beginning of each year. After running the estimator, you can update your W-4 accordingly and provide it to your employer.
Edited [5/13/2026 l 12:06 PST]
@rmeaders
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