Personal Tax records may have to be produced if the Internal Revenue Service (state or local taxing authority) were to audit your return or to seek to assess or collect a tax. In addition, lenders or other private parties may require that you produce copies of your tax returns as a condition to lending money, approving a purchase, or otherwise doing business.
The checklists provided in the PDF document are suggestions for the length of time records should be kept. Use common sense in determining which records are important to keep for tax purposes.
Personal Record Retention Checklist