Value-added and Non-value-added Business Tax Act Article 40

For pawnshops and other business entities governed by Article 21 and Article 23, respectively, the competent tax authority shall assess the sales amount and tax payable and issue a payment notice every three months.For business entities governed by Article 22, the aforementioned procedures shall be done monthly.The rules in assessing sales amount and tax payable, as mentioned above, shall be prescribed by the MOF.
中文原文 加值型及非加值型營業稅法第40條
依第二十一條規定,查定計算營業稅額之典當業及依第二十三條規定,查定計算營業稅額之營業人,由主管稽徵機關查定其銷售額及稅額,每三個月填發繳款書通知繳納一次。
依第二十二條規定,查定計算營業稅額之營業人,由主管稽徵機關查定其銷售額及稅額,每月填發繳款書通知繳納一次。
前二項查定辦法,由財政部定之。

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