How do I owe taxes?

Most people don't actually "owe" taxes on April 15, having already paid too much in the prior year's withholdings or estimated tax payments. If your account is within 10 percent of your tax liability, you're doing great. It's better to owe a little than to have "loaned" the IRS your money, interest free, and then have to beg to get a refund...

So?

Yeah, the W-4 withholding system is not perfect. While single/0 or even single/1 should have been enough to cover the bill, it's not a guarantee.

If you don't like owing a mere $150, then you can add $10 per pay period to the W-4.

if you claimed 0 on your W-4 they would have been withholding the maximum they can on your gross

it sounds like they failed to do this if you owe $150

check with your pr dept to see what they have for your withholding

owing $150 is not a bad thing since you had the use of your money all year

It does sound like something night be wrong. With one job, on a W-2, claiming 0 on your W-4, and no other income, normailly they'd take out more than enough. Please post again showing what's in box 1 and 2 on your W-2. Are you a dependent? Who did your taxes, or did you do them yourself?

that is not bad.

just get more deducted, about $150 per year