(1) A person filing a timely return under 15-68-502 may claim a quarterly vendor allowance for each permitted location in the amount of 5% of the tax determined to be payable to the state. (2) The allowance may be deducted on the return. (3) A person that files a return or payment after the due date for the return or payment may not claim a vendor allowance.
Vendor Allowance
Mont. Code Ann. § 15-68-510, under Returns and Payment.
Mont. Code Ann. § 15-68-510