The goal with taxes is to have your withholding or estimated tax payments right through the year so you are neither owed a big refund nor forced to make a big payment to the IRS. If you do have a significant imbalance, it probably means your paycheck withholding is screwed up. You have either claimed too many or too few allowances.
Click HERE for a withholding calculator to determine how many allowances to claim in the hopes of getting your withholding closer to your actual tax liability.
Once you've determined the proper number of allowances to claim, you fill out a new W4 with your HR department and they adjust the withholding in your paycheck.
And about that paycheck, with the new amount of withholding, what will your take-home pay actually be?
Click HERE for a paycheck calculator to get a sense of your adjusted monthly income.
On the left hand side of the irs.gov Web site is a link where you can check the status of your refund. This service will tell you the estimated delivery date of your tax refund. The IRS says "you can generally get information about your refund 72 hours after IRS acknowledges receipt of your e-filed return, or three to four weeks after mailing a paper return."
The IRS never initiates communication with tax-payers via e-mail, NEVER. So ignore any unsolicited e-mail about taxes -- it's spam and probably a scam.