HOW LONG SHOULD I KEEP DOCUMENTS FROM A FILED TAX RETURN?
Usually, IRS suggests all tax payers, for own safety to keep every tax records for a couple of decades and retain it for themselves. They are very useful particularly if you have received any assessment notices from revenue agency to support your claim or defense. There's also evidence of you keeping financial expenses and related documents to support tax returns in need while dealing with multiple tax issues and forms is another key issues.
However, if the tax-related documents and tax deduction receipt were to be disposed from our system or discarded away, in case of any audits from IRS or any disputes from tax officials and tax problems; we may have missed certain info by filing claims.
Note: If these records are not kept properly in electronic or scanned or system hard copy documents, the important business-making information, tax calculations is potentially lost to use later.