I claimed my daughter on my taxes she turned 18 at the end of December she went to file her taxes and claim her son she was told that she cant file her return using her ssn cuz her ssn was used as a

[xmasbaby0]

" I claimed my daughter on my taxes"   

A dependent cannot HAVE a dependent.  if you claimed your 18y ear old---as you can---then she cannot claim her child as a dependent.  But---you could have claimed the child on your tax return.  

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, fiance (etc.) as a dependent on your 2019 taxes as long as they meet the following requirements:

Qualifying child

• They are related to you.

• They cannot be claimed as a dependent by someone else.

• They are a U.S. citizen, resident alien, national, or a Canadian or   Mexican resident.

• They are not filing a joint return with their spouse.

• They are under the age of 19 (or 24 for full-time students).

• No age limit for permanently and totally disabled children

  •      They live with you for more than half the year (exceptions apply).

Qualifying relative

• They don't have to be related to you (despite the name).

• They cannot be claimed as a dependent by someone else.

• They are a U.S. citizen, resident alien, national, or a Canadian or Mexican resident.

• They are not filing a joint return with their spouse.

• They lived with you the entire year.

• They made less than $4200  (not counting Social Security)

• You provided more than half of their financial support. More info

When you add someone as a dependent, we'll ask a series of questions to make sure you can claim them.

Related Information:

• Does a dependent have to live with me?

• What does "financially support another person" mean?

• Can I claim a newborn baby?

[xmasbaby0]

Your daughter can file a tax return to seek a refund of tax withheld, but must say on her return that she can be claimed as a dependent on someone else's return.

YOU can wait for your own return to be processed then amend to claim your grandchild,

How do I amend my 2019 TurboTax Online return?

The 1040X becomes available later in February, so you have to wait for it.  If your return is still being processed now, it would not be a good idea to amend yet anyhow.  Sending in an amended return while they are still processing your original return could cause confusion that would delay your refund for months.

Check back later for the 1040X.   AFTER your return has been fully processed.

[Carl]

Take note that your return is not fully processed until *AFTER* you have received any refund due.

A dependent can not file a joint return, and can not claim dependents of their own. So at this time your daughter must remove the dependent from her return and she just select the option for "I can be claimed on someone else's return". Understand that it does not matter if you the parent actually claim her or not on your return. If she "QUALIFIES" as your dependent (and I'm sure she does) then your daughter has no choice but to select the option for "I can be claimed on someone else's return."

Being that your daughter was under the age of 19 (not 18) if she is living at home with you and she did not provide more than half of her own support, that makes her your qualifying dependent. It does not matter how much money your daughter earned in 2019 either. She could have earned a million dollars, but if *YOUR DAUGHTER" did not provide more than half of "HER OWN" support, she qualifies as your dependent weather you actually claim her or not.

There is no requirement for you the parent to provide any support. Not one penny. The support requirement is on your daughter, and only your daughter.