I get taxes taken out of my check every pay period. Why do I owe on my taxes?

[SteamTrain]

It may have not been set properly to cover all of your taxes for the year.

IF the $$ amount you owe is really high (over $1000) , you might need to change your W-4 claims at your W-2 employer to increase the withholding being done. 

Also, if you do have some Self-employment income, you need to either  a)  increase that withholding at the W-2 job, to an amount greater than  would be normally needed for just that W-2 income, or b) pay separate Quarterly Estimated Tax Payments to cover both the SE taxes  (SS and Medicare taxes), and the Income taxes that may result from your SE income. 

[fanfare]

you need to have your employer take more out of your check every pay period.