How do I add a adult dependent I support financially on my taxes I can’t go back

If you have filed the 2024 tax return then you will need to amend the return to add a dependent.

Before starting to amend the tax return, wait for the tax refund to be received or the taxes due to be paid and processed by the IRS.

See this TurboTax support FAQ for amending a current year tax return - https://ttlc.intuit.com/turbotax-support/en-us/help-article/tax-return/amend-federal-tax-return-current-year/L7eS6o1qh_US_en_US?uid=lfunevhk

If you need to add a dependent you have to do that in MY INFO.    An adult dependent might be a "qualified relative dependent if they had less than $5050 of income in 2024 --not counting Social Security.  They may or may not have to live with you the whole year, depending on whether there is a family tie.  If the dependent is a BF or GF, they have to live with you the whole 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.

Related Information:

• What does "financially support another person" mean?