Generally yes. There is no age limit for permanently and totally disabled children however there are other requirements that need to be met. In TurboTax, add the child as a dependent. TurboTax will ask a series of questions to make sure you can claim them.
Additional information: You may claim a child, relative, friend, or fiancé (etc.) as a dependent on your 2020 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.
- They made less than $4,300 in 2020.
- You provided more than half of their financial support.
Related information: Do I need to report my dependent's SSA-1099 on my return?
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