How long should you keep your tax records?

Federal law requires you to maintain copies of your tax returns and supporting documents for three years. This erroneously leads many people to believe they're in the clear as long as they retain their documents for this period of time.

However, if the IRS believes that you have significantly underreported your income (by 25 percent or more) or that there is indication of fraud, it may go back as far as six years in an audit. To be safe, use the following guidelines.

Business records to keep for…

Personal records to keep for…

Special circumstances…