Regulations Governing the Use of Cash Register by Business Entities Article 6

When using cash registers to issue duplicate copies of uniform invoices, the business entity should print on the uniform invoice trading date, code of goods or service sold, tax code, quantity, unit price, amount, total, cash register number and trading code, as well as the buyer's business administration number, if the buyer is also a business entity, and give the receipt to the buyer, while keeping the seller's copy.When using cash registers to issue triplicate copies of uniform invoices, the business entity should follow the provisions in the foregoing paragraph, and in addition, indicate the sales amount and output tax on the uniform invoice separately if the buyer is also a business entity. The first copy of such uniform invoice is the tax deduction copy, which should be given to the buyer for tax deduction or tax credit if the buyer is a business entity, or disposed of by the issuer if the buyer is not a business entity; the second copy is the receipt copy, which should be given to the buyer for bookkeeping; the third copy is the stub copy, to be kept by the issuer. Uniform invoices issued by a business entity are not required to be stamped with the unique uniform invoice chop if the name, address and business administration number of the business entity are already printed on the invoice.
中文原文 營業人使用收銀機辦法第6條
營業人使用收銀機開立二聯式統一發票,應列印交易日期、貨物或勞務之編號、課稅別記號、數量、單價、金額、總計、收銀機編號及交易序號,買受人為營業人時,並應加印其統一編號。
存根聯由開立人保存,收執聯交付買受人收執。
營業人使用收銀機開立三聯式統一發票,除應依前項規定辦理外,買受人為營業人時,銷售額與銷項稅額應於統一發票上分別載明之。
第一聯為扣抵聯,交付買受人作為依本法規定申報扣抵或扣減稅額之用,但買受人為非營業人時,由開立人自行銷燬,第二聯為收執聯,交付買受人作為記帳憑證,第三聯為存根聯,由開立人保存。
營業人依前二項規定開立統一發票,已列印其名稱、地址及統一編號者,免加蓋統一發票專用章。

English translation for reference only; the Chinese text prevails. Not legal advice.