US lawWashingtonRegulationsTitle 308 — LICENSING, DEPARTMENT OFChapter 308-78 — AIRCRAFT FUEL TAX308-78-070WAC 308-78-070WAC 308-78-070. RecordsLast amended: 2016Year: 2026Length: 34 wordsOfficial source How long must I keep my records? Licensees must keep records for at least five years from the reporting period. Refund claimants must keep records for at least five years from the filing date.PreviousWAC 308-78-046NextWAC 308-78-075