My federal return came in less than half of what I was expecting and my state return was completely taken, yet I don’t know of any debts I owe.

[Anonymous]

we can't see your return and have no way of knowing if the difference was errors in the return or the refund was taken for debts owed.   anyway in 2-3 weeks you should get a notice explaining  what happened. 

For non-IRS debts, you can contact the Bureau of the Fiscal Service (BFS) directly at (800) 304-3107 to find out if there is a pending offset of your refund and for how much. In addition, you will get an explanatory letter from the BFS if your refund is offset.

[fanfare]

You probably filed an incorrect return and the IRS and state agency made corrections for you.
OR

you owe back taxes.