How to get Turbo Tax to allow child tax credit for a supported adult child living away from home?

[xmasbaby0]

There is no child tax credit for an adult.  You lose the child tax credit when the child turns 17.  After 16, you can get the $500 credit for other dependents.   

If your adult child lives away from home, you *might* still be able to get that $500 credit if the child meets the criteria to be claimed.  You have not mentioned if the adult child is a student.   If they are a student there are other possible credits like education credit or earned income credit if they can still be your qualifying child dependent.

IRS interview to help determine who can be claimed:

https://www.irs.gov/help/ita/who-can-i-claim-as-a-dependent

WHO CAN I CLAIM AS A DEPENDENT?

You can claim a child, relative, friend, or fiancé (etc.) as a dependent on your 2024 taxes as long as they meet the following requirements:

Qualifying child

• They're related to you.
• They aren't claimed as a dependent by someone else.
• They're a U.S. citizen, resident alien, national, or a Canadian or Mexican resident.
• They aren’t filing a joint return with their spouse.
• They're under the age of 19 (or 24 for full-time students).
• No age limit for permanently and totally disabled children.
• They lived with you for more than half the year (exceptions apply).
• They didn't provide more than half of their own support for the year.

Qualifying relative

• They don't have to be related to you (despite the name).
• They aren't claimed as a dependent by someone else.
• They're a U.S. citizen, resident alien, national, or a Canadian or Mexican resident.
• They aren’t filing a joint return with their spouse.
• They lived with you the entire year (exceptions apply).
• They made less than $5050 in 2024 (not counting Social Security)
• You provided more than half of their financial support.

When you add someone as a dependent, we'll ask a series of questions to make sure you can claim them. There may be other tax benefits you can get when you claim a dependent.

[roger_dat]

The credit is for "other dependents".  The interactive IRS website link you provided confirms that $500 credit is valid if I provide over half of support and dependent doesn't earn over $5050.  Turbo Tax message comes back as "we don't have enough information to determine if this is a dependent".  That's b/c TurboTax never asks for the dependents income.  There's a bug or missing input in TurboTax. Is there a way to override and do manual entry of this credit?

[xmasbaby0]

You must have missed the question.   You are asked in MY INFO if the person you are claiming as a dependent had an income of more than $5050.   Click his name and go through the questions again, or try deleting him and then re-entering him and go through the interview screens again.

[roger_dat]

Deleted and re-entered; didn't help.  The question for dependents income only comes up if the person is not my child, and that requires that the person lived in my house. I'll have to try taxact or taxslayer to see if they follow the IRS rules.