A tornado slides across Oklahoma. Image courtesy NSSL/NOAA. Continued vigilance and quick response to tornado watches and warnings are critical, since tornadoes can strike virtually anywhere at any time. Most tornadoes are abrupt at onset, short-lived and often obscured by rain or darkness.
Most nonprofits and charities must keep books and records for a minimum of six years from the end of the last tax year to which they relate. This retention period will be extended if returns are late-filed or if there is a notice of objection or appeal underway.
1 Health explanation of benefits: 1 year. 2  Utility records: At least 3 years, according to NY State Department of Consumer Protection. 3  Taxes and supporting records (e.g., tax-related medical bills, donations, etc): The common recommendation is 7 years, because that's how far back the IRS usually goes if you're audited.