If you had insurance under the Affordable (what a lie) Care Act and had your premiums subsidized, you may have to repay some or all of the subsidized portion. You may have entered something incorrectly, causing this situation. We don't have access to your return. The calculation is on Form 8962. With online, you need to pay your fees to see it. If you file without it, eventually the IRS will request it. If you don't file and pay, the IRS will eventually levy your assets and salary. Penalties and interest for nonpayment increase daily after 4/15.
If you had it, it doesn't matter whether you used it or not.
