How will you know if you owe taxes?

The best and most direct way is to contact the IRS directly. There are many reasons why you would not know if you owe, specially if you have not filed a return in some time. The IRS could have produced a Substitute for Return (SFR) on your behalf, thereby assessing a liability upon which interest and penalties (failure to file and failure to pay) start to accrue.

If you have moved since the last time that you filed a tax return the IRS may be sending collection notices to your old address.

When it comes to the IRS the more pro-active you are the better off you are. The number to contact them is 800-829-1040.