There are plenty of tax deductions that people often forget to utilize when they file their returns. If we believe the annual reports published by IRS, the most common mistake that people make is in entering their social security number – they either forget to enter it at all or enter wrong digits. This example is a proof that when it comes to making mistakes, the opportunities out there are almost unlimited. The fewer mistakes you make, the higher amount of money you can save in taxes. So, here you go; following is a list of forty-five most common deductions that are often overlooked.