Reenacts GS 105-164.21 and makes the following changes. Increases the "merchant's discount" set forth in GS 105-164.21, now allowing a retailer who pays the retail sales and use tax imposed by Article 5 to deduct from the amount of the tax paid a discount of 3%, not to exceed $5,000 (was 1%, not to exceed $500).

Amends the following statutes to exclude the merchant's discount from the taxes specified. 

Amends GS 105-474 to exclude the merchant's discount from the scope of Article 39, which provides for a one cent local government sales and use tax subject to the application of Article 5 provisions. 

Amends GS 105-187.5 to exclude the merchant's discount from the scope of the statute, which permits a retailer to elect to pay a tax on the gross receipts of the limited possession commitment of a motor vehicle in lieu of the highway use tax imposed under Article 5A. 

Amends GS 105-187.17 to exclude the merchant's discount from the scope of Article 5B, which governs the scrap tire disposal tax. 

Amends GS 105-187.22 to exclude the merchant's discount from the scope of Article 5C, which governs the white goods (large appliances) disposal tax. 

Amends GS 105-187.32 to exclude the merchant's discount from the scope of Article 5D, which governs the dry-cleaning solvent tax. 

Amends GS 105-187.52 to exclude the merchant's discount from the scope of Article 5F, which governs taxes on certain machinery and equipment, since repealed effective July 1, 2018.

Applies to returns filed on or after July 1, 2021.