@bob_cutler Here's something else you could try that might work better for you. If you are using the CD/Download TurboTax software, use the What-If Worksheet in forms mode to do an estimate of your 2021 tax. Divide the tax that it shows you owing by 4 to determine your estimated tax payments. It's not as user-friendly as the question-and-answer interview, but it will do all the calculations you need, including calculating the taxable amount of your Social Security. If you need 1040-ES vouchers, print blank vouchers and fill them in by hand.
