I have seen similar situations but not my situation exactly and really looking for help!
I am a married graduate student filing jointly with my husband. Last year I received a graduate teaching assistant stipend and tuition remission from my university. The university thus issued me a W2 for 2021 but no 1098-T. I only had a small amount of taxes withheld federally and my husband had regular taxes deducted by his employer every month. How do I report my graduate student income as married filing jointly with my husband? It seems like something is wrong when we enter it as we would for a "normal" job because our estimated taxes due from Turbotax do not seem reasonable.
Additionally (for bonus points! 😄 ), for 2022 I will have both a teaching assistant stipend AND an NIH NRSA F31 Fellowship stipend. I am even more unsure how I will be reporting that income, as YTD the university has not withheld any federal tax and I don't know how to enter this into the IRS estimator tool (https://apps.irs.gov/app/tax-withholding-estimator/) to try and amend our withholding.
Stipends and fellowships are both taxable, “tuition reduction” is not taxable.
If no tax is withheld going forward, you might consider making Estimated Tax Payments.
If you can estimate your tax bracket, you can estimate the amount you should send in quarterly.
Tax are due "as you earn" so you can get a penalty if you wait until you file to pay.
For 2021 was the tuition reduction reported on your W2?