The key to surviving an audit is having adequate records. If you keep quality records, the IRS will be able to re-calculate your tax with relative ease. If the IRS agent has an easy job performing your IRS audit, chances are he or she will be a lot friendlier towards you. A friendly IRS agent makes an IRS audit much easier to survive.
If you are searching through your records and notice that there are some missing receipts or documentation, find them now. If you don't have the records requested in your IRS audit notice, your deduction could be denied and you could owe more taxes. In addition, make sure that you do not bring any records or documentation not requested on your original IRS audit notice. This will prevent the IRS agent from bringing up issues that may cost you more money in taxes.
Individuals should keep tax records for three to five years. For the mosts part, the IRS won't audit any return that is over three years old. However, if they suspect tax evasion or fraudulent returns the IRS can go back as many years as they like.