Washington Revised Code Title 82. Excise Taxes § 82.42.140. Periodic tax reports

(1) For the purpose of determining the amount of liability for the tax imposed under this chapter, each aircraft fuel distributor must file monthly tax reports with the department.

(2) Tax reports must be filed on or before the twenty-fifth day of the calendar month following the reporting period to which it relates. A report must be filed even though no tax is due for the reporting period. Each report must contain a declaration that the statements contained therein are true and are made under penalties of perjury. The report must show information as the department may reasonably require for the proper administration and enforcement of this chapter.

(3) If the filing date falls on a Saturday, Sunday, or legal holiday the next secular or business day is the filing date.

(4) The department in order to insure payment of the tax or to facilitate administration of this chapter may require the filing of reports and tax remittances at intervals other than one month.

(5) During a state of emergency declared under RCW 43.06.010(12), the department, on its own motion or at the request of any taxpayer affected by the emergency, may extend the time for filing any report or the due date for tax remittances as the department deems proper.