5 Last-Minute Tax Tips You Shouldn’t Forget

4. Think about 2013 estimated taxes, as well.
If you found that you didn’t have enough tax withheld from your paycheck last year to cover your tax bill, you may need to pay estimated taxes in 2013 to avoid penalties. If so, the first quarterly installment is due on the same date as your 2012 return — April 15. Use Form 1040-ES to calculate and pay your taxes.