Business entities that use cash registers to issue receipts instead of issuing uniform invoices shall issue a uniform invoice in duplicate each day, which states the daily total of cash register receipts issued (based on seller's copies) minus the amount for which uniform invoices have been issued, mark the wording of "Summary Issue" on such invoices and keep them. At the time of filing a tax return for the period, the business entity should note the amounts of summary uniform invoices in the detailed list of uniform invoice attached to the tax return.