While federal guidelines do not require you to keep tax records "forever," in many cases there will be other reasons you'll want to retain these documents indefinitely.
• Audit Reports from CPAs/Accountants
• Cancelled Checks for Important Payments (especially tax payments)
• Cash Books, Charts of Accounts
• Contracts, Leases Currently in Effect
• Corporate Documents (incorporation, charter, by-laws, etc.)
• Documents Substantiating Fixed Asset Additions
• Deeds
• Depreciation Schedules
• Financial Statements (Year End)
• General and Private Ledgers, Year End Trial Balances
• Insurance Records, Current Accident Reports, Claims, Policies
• Investment Trade Confirmations
• IRS Revenue Agent Reports
• Journals
• Legal Records, Correspondence and Other Important Matters
• Minutes Books of Directors and Stockholders
• Mortgages, Bills of Sale
• Property Appraisals by Outside Appraisers
• Property Records
• Retirement and Pension Records
• Tax Returns and Worksheets
• Trademark and Patent Registrations