It depends on what "I was previously a student who had no idea about taxes etc. I was a student until 2022, and I did not file my 1098-T for 2018, 2019, 2020, and 2021" really means?
Did you not file a tax return, at all, or did you file a tax return and not include the 1098-T?
It is too late to claim a refund for tax years 2018 and 2019. There is a three year limit. You have until April 15, 2024 to file a 2020 tax return or amended return.
As others have said, a student who can be claimed as a dependent, is generally not allowed to claim a tuition credit, particularly the refundable American Opportunity Tax (Tuition) Credit (AOTC). Your parents would claim it instead of you.
Q. How can I backfile these taxes from the previous years?
A. TurboTax (TT) Online is not available for past years. The desktop (download/CD) versions are still available for 2020-2022. The Deluxe version is all you need.
https://turbotax.intuit.com/personal-taxes/past-years-products/
Your return is simple enough, you might want to try it by hand. You will need forms 1040 and 8863.
https://www.irs.gov/forms-pubs/prior-year
