It's kind of like when you're running late to go somewhere, but after you lock up the house, you feel an urgent need to unlock the door and go back inside to make sure you haven't left the lights on or the stove on or the refrigerator door open or something.

To help make sure you haven't forgotten anything and ease your mind as the tax deadline approaches, here are some last minute tax tips from MarketWatch.

Also, here's a video about how to pay your taxes using your smartphone.