The tax imposed under the sales tax act shall be assessed within three years from the date the return is filed. However, if any person obligated to file a return for taxes imposed under the sales tax act fails to file a return for any reason, the tax may be assessed at any time. A levy or other proceeding to enforce the collection of the tax, penalty and interest may also be commenced at any time.
Kan. Admin. Regs. § 92-19-63