In any case where a holder files a written protest of examination findings with the Treasurer as provided by 735:80-1-4, the holder may pay the amount specified in the examination findings and designate the payment as being made under protest. Such payment shall stop the accrual of interest, if any, upon the amount paid. If the Treasurer sustains the protest in whole or in part, the amount determined by the Treasurer not to be due shall be refunded to the holder, without interest.
Okla. Admin. Code § 735:80-1-6