Same thing happened to me. Filed joint return March 10, 2024 and got IRS Notice CP10 stating "Your 2024 return has been changed". I paid for the Turbo Tax Deluxe Desktop software. I'm retired accountant so have always just gone to Forms to start a new years return and I never ran across any question asking about living abroad where SS proceeds were taxed and the answer would be no anyway. So I owe around $5,000 more in Federal income tax as a result of Turbotax's error but fortunately IRS just took the difference out of my refund that I had applied to 2025 estimated taxes. My Idaho state tax was filed at same time and I expect them to notify me about the extra tax due but this might take a month or two. Maybe right after April 15th I should just file an amended Idaho return and pay the additional taxes.
My question now is how to correct the Turbotax mistake affecting my 2024 1040 as I have a carry forward into 2025 tax year for Itemized Deductions and that amount will change along with my estimated tax requirements. Filing a amended 2024 Federal return would be wrong as IRS already sent me the correction notice and reduced the amount of my refund accordingly so that is all good.
