Your tax bracket depends on your taxable income and your filing status. The amount withdrawn from the 401k is added to your other taxable income which may or may not put you in a higher bracket. That does not mean all of your income is taxed at the percentage of your total taxable income.
For example if you have $50,000 of taxable income: the first $9,875 is taxed at 10%. Then $30,249 is taxed at 12%. Then $9,876 is taxed at 22%
Tax Brackets for tax year 2020 - Single
Tax Rate
10% - 0 to 9,875
12% - 9,876 to 40,125
22% - 40,126 to 85,525
24% - 85,526 to 163,300
32% - 163,301 to 207,350
