i have technically been getting taxed, but on box 2 i have $8.43. i live on my own and work full time now but i never noticed i was “exempt” because i was getting taxed either way. i’ve had 3 jobs before this and this has never happened. can this be fixed or will i have to pay the IRS regardless?
If you owe federal income taxes on you federal tax return those taxes have to be paid.
Complete a new W-4 with your employer, if not already done, to adjust your allowances.
Since they didn't withhold taxes and pay it in for you throughout the year, if you end up owing on the tax return, you'll have to pay that by April 15th 2019.
You could pay early, I suppose, but there isn't any other "fix."
If you end up owing too much you may get a bill from the IRS for a penalty based on when they get your tax due payment.