Geez...In the last 15 mins I've had 2 neighbors and 3 phone calls asking me what to do about filing...One neighbor even offered to pay me to do her taxes tonight...Forget it...If you don't know what to do at this point...File an extension...You can do it online...Just put down that you owe the same amount that they withheld...If the difference is real big then you'll owe some hefty underpayment penalties...If it isn't then you'll just owe some interest...But at least you'll avoid the late filing fees which are pretty hefy %-wise.