After filing your tax returns, be sure to keep a copy for your records. You never know when you may need to take a look at information in past tax returns. Sometimes, people are given a surprise visit from the IRS and required to show their past tax returns. By having a copy on file, you can instantly check and see where you may have miscalculated your taxes. The IRS tends to be quite unforgiving of individuals who are not organized and who may owe back taxes to the IRS. Prevent any further hassle from the IRS by keeping your back taxes.