A. Every vendor selling tangible personal property or taxable services for storage, use, consumption, or distribution in this state shall on or before the twentieth (20th) day of each month file with the Commissioner a return for the preceding monthly period in such form as may be prescribed by the Commissioner. The form shall include the total combined tax due on all tangible personal property or taxable services sold by the vendor during such preceding monthly period, the storage, use, consumption, or distribution of which is subject to the use tax, and such other information as the Commissioner may deem necessary for the proper administration of the Compensating Tax Act. The return shall be accompanied by remittance of the amount of tax required to be collected by the vendor during the period covered by the return. The return shall be signed by the vendor or his duly authorized agent. A return filed electronically does not need to be signed.

B. Every person purchasing tangible personal property or taxable services for storage, use, consumption, or distribution in this state and who has not paid the tax due to a registered vendor, shall on or before the twentieth (20th) day of each month file with the Commissioner a return for the preceding monthly period in such form as may be prescribed by the Commissioner. The form shall include the total tax due on all tangible personal property or taxable services purchased during such preceding monthly period and such other information as the Commissioner may deem necessary. The return shall be accompanied by a remittance of the amount of tax required to be paid by the person purchasing such tangible personal property or taxable services during the period covered by the return. Such return shall be signed by the person liable for the tax or his duly authorized agent.

C. Each purchaser liable for a use tax on tangible personal property or taxable service is entitled to full credit for the combined amount or amounts of legally imposed sales or use taxes paid by him with respect to the same property or service to another state and any subdivision thereof. The credit shall be applied first against the amount of any use tax due the state, and any unused portion of the credit shall then be applied pro rata against the amount of any use tax due a local jurisdiction.