leroyjenkens said:
There are a bunch of deductions on the tax forms that I don't use because I never owe at the end of the year. So if I ended the year owing money, would those deductions kick in and take away the money I owe?
Well, yeah, that's what the deductions are there for.
There are different forms which are used when filing federal taxes, however, and different deductions are available on each.
The simplest form is the 1040EZ. You get a single deduction because your life is pretty simple: you don't make a lot of interest on your savings, you don't own a house, you haven't racked up a lot of medical bills, etc.
The 1040A Form (or the Short Form, as it's called) is a little more complex than the EZ and more deductions are available.
The 1040 Form (or the Long Form) is the one which is the most complex of all. Different forms called Schedules can be filled out and attached to the 1040, things which cover deductions, capital gains, self-employment income, real estate income, etc. Typically, if people need to fill out a Long Form, they go to a tax service or an accountant for help.
Generally, in addition to a personal exemption of $3950, one is also allowed a
standard deduction from income of $6200 when filing single. This deduction typically covers most of the things which can be deducted from income which are also called
itemized deductions, things like mortgage interest, medical expenses, etc. Unless the total of your itemized deductions exceeds your standard deduction, generally there is no tax benefit to itemizing deductions.
However, if you are single, not living with any dependents, and aren't
qualified to take those deductions, the tax you owe is pretty much what is being withheld from your paycheck. It might be a different story on your state income tax, however, as sometimes states allow individuals to deduct federal income taxes from their income when calculating state income tax.