Who says you owe taxes? And what do you mean?
Do you mean you got a phone call asking you to pay some taxes? That's probably a scam. The IRS and state send letters. If you got a call from someone claiming to be a collections agency, a tax debt wouldn't be sent to a legitimate collections agency until after you had ignored many letters from the state (the IRS doesn't use collections agencys but a state might.) If you check with the IRS and the state and you don't owe a current payment, then the phone call is almost definitely a scam.
Did you get an official letter? What is the type of letter (shown in the top right corner) and what exactly does it say? The state or IRS may have adjusted your tax return and added income that they think you forgot, or they denied a deduction you claimed. We need more information to help you.
Are you asking in general, why do you owe a payment this year instead of getting a refund? Print your return and review it, it's just addition and subtraction. You probably did not have enough withholding from your job. There can be several reasons for this, we would have to know more about your situation. The government won't be able to explain your tax situation to you if you haven't filed yet because they can't see your tax return until you file.
