1-218. Filing by mail; date of filing


A. Any report, claim, tax return, statement, payment, deposit, or other material
dealing in any way or manner whatsoever with taxation, other than petitions or notices of
appeal, which is required or authorized to be filed with or made to the state or any
agency or political subdivision thereof which is deposited, properly addressed and
postage prepaid, in an official depository of the United States mail shall be deemed
filed and received by the addressee on the date shown by the postmark or other official
mark of the United States mail stamped thereon, or, if the sender disputes the dates
contained on such mark or no such mark appears or is legible, on the mailing date as
established by competent evidence introduced by the sender.


B. Any filing described in subsection A which is not received by the addressee
shall be deemed filed and received on the date of mailing if the sender establishes the
date of mailing as provided in subsection A and files with the addressee a duplicate
filing within ten days after written notification of nonreceipt of such filing is given
to the sender by the addressee.


C. If any filing described in subsection A is sent by United States certified or
registered mail or certificate of mailing, the date of such registration, certification
or certificate, as established by a record authenticated by proper officials of the
United States mail, shall be deemed the date of filing.


D. If the due date of any filing described in subsection A falls upon a Saturday,
Sunday or legal holiday, the filing shall be considered timely if performed on the next
business day.


E. For the purposes of tax administration, references in this section to:


1. "United States mail" are considered to include any designated delivery service
provided by a trade or business if the service has been designated by the United States
secretary of the treasury pursuant to section 7502(f) of the United States internal
revenue code of 1986.


2. "Postmark" are considered to include any date recorded or marked by any
designated delivery service and described in section 7502(f)(2)(C) of the internal
revenue code.


3. "Registered" and "certified" are considered to include any equivalent service
maintained by a designated delivery service.