@Jvisme just use this website.
you can make two passes at it.
1) social security and work income on the first pass
2) work income on the 2nd pass; do not include the SS income
the difference between the two is the tax on SS.
https://www.dinkytown.net/java/1040-tax-calculator.html
the combination of the two is what you would owe.
and it may be better to use the IRS Withholding Estimator - it is quite accurate. Have you latest paystub and social security payment handy. it will determine how to complete your W-4 so that you do not owe at the end of the year.
https://www.irs.gov/individuals/tax-withholding-estimator
