@PatF wrote:
Thanks - that's good to know it's an estimate. I always get my return and payment sent in at least a few days prior to April 15, so if that's the reason for the discrepancy that makes sense. It doesn't make sense that it would be over $100 difference on a $4000 payment if it's just a day or two later than the 15th though.
You are supposed to make quarterly payments to stay on top of your tax bill, not owe a large sum when you file. If you owed $4000, that means the IRS will consider that you were $1000 short as of April 15, 2022; $2000 short as of June 15; $3000 short as of September 15; and $4000 short as of January 15, 2023 (since those are the dates when the quarterly payments were due).
https://turbotax.intuit.com/tax-tips/irs-tax-forms/what-is-form-2210/L2z0haVWb
I don't know why there would be such a discrepancy between the IRS calculation and Turbotax, you can look at your copy of form 2210 and see how the estimate was calculated
