Regarding this, my former institute issued me a W2 for my stipend from 2018 onwards, which is FICA exempt. As such, I didn't have any FICA tax taken out from that salary (see IRS 970). How do I ensure this is reflected in TurboTax? When I input it as a W2 salary, my return drops by the amount that I would have paid in FICA taxes, suggesting that I owe that in back tax.
~ Joe G.