I want to know if I can add my 2021 1098-t to this tax because I didn’t file last year

No.  2021 Educational expenses (including those shown on the 2021 1098-T) can only be claimed on a 2021 tax return.  It is not too late to file a 2021 tax return, if you (or your parents) are eligible for a 2021 credit. 

If you were your parent's dependent, in 2021, they should claim your 1098-T on their 2021 tax return. If they did not do so, they can still file an amended 2021 return to do so now. 

There's a new urban myth among college students that says they can get a $1000 from the government just for filing a tax form. For most of them, they simply aren't eligible. A full time unmarried student, under age 24, even if you don't qualify as a dependent, is only eligible for the refundable portion of the American Opportunity Credit if he supports himself by working. You cannot be supporting yourself on parental support, 529 plans or student loans & grants. It is usually best if the parent claims that credit. 

You cannot claim a credit if you are, or can be, claimed as a dependent by someone else.

Reference: Line 7 instructions for form 8863. https://www.irs.gov/instructions/i8863