You only have to pay a tax on your SS benefit IF you are over a certain income.
Maybe this will help you do an estimated for 2022 once you know your income after retirement.
IRS Notice 703 (Rev Oct. 2021)
This one just tells you if the benefit is taxable.
Here's the actual IRS instruction for 2021 and the worksheet. To figure it more closely to the amount that will be taxed use the (2021) actual worksheet for a closer approximation.
IRS 2021 Form 1040 /1040 SR Instructions
You can find the instructions for completing Line 6a/6b (Social Security) of Form 1040 on page 29, the worksheet is on page 31.
Just to give you a bit more info - if you have to pay any tax on your social security benefit, thank you from all of us, cause the amount is not an income tax - it is a Social Security retirement tax and goes back to the General SS Trust Fund to help keep it afloat.
It's Always Something . . . . Roseanna Roseannadanna