..."nonrefundable Child Tax Credit or credit for other dependents on your tax return because you either didn't enter an amount [note: this isn't true] or entered an incorrect amount based on the number of boxes you checked on page 1 of your return".
It's possible your depedents are listed correctly but you took an amount (credit) you are not entitled to.
If you think your tax return is correct, you have to dispute the IRS changes in writing.
Thank you for the response. I will contact the IRS. They actually just make a statement, yet don't say what they would have put in the boxes based on their interpretation.
What's confusing is the math looks right (children under / over 18; takes into account income). I guess there is an assumption on my part the TurboTax sw calculates it correctly.
Take care. I appreciate your time.
Is this for your 2023 return? The age for the Child Tax Credit is UNDER 17 on Dec 31, 2023. Check the birthdates. Is the right box checked on the 1040 first page for Dependents? Box 4 for Child tax credit? Turbo Tax automatically gives you the right CTC based on your entries. Maybe the IRS changed your income or tax?