Value-added and Non-value-added Business Tax Act Article 42-1

After receiving the business tax return, the competent tax authority shall, within six months counting from the day following the expiration of the filing period set forth in Article 35, assess the sales amount and the business tax payable or overpaid.When a taxpayer voluntarily files a supplementary tax return with the competent tax authority and makes a supplementary payment for the amount of tax owed, the competent tax authority shall assess the filing within six months from the day following its receipt of the same.With respect to cases required to be assessed by the competent tax authority under Paragraph 1 above, if there is no supplementary payment of tax due or refund of tax due, the competent tax authority may make a public announcement, specifying that the assessment is made based on the information in the tax return declared by the business entity, in lieu of delivering a notice of the assessed tax amounts.
中文原文 加值型及非加值型營業稅法第42-1條
主管稽徵機關收到營業稅申報書後,應於第三十五條規定申報期限屆滿之次日起六個月內,核定其銷售額、應納或溢付營業稅額。
依稅捐稽徵法第四十八條之一規定自動向主管稽徵機關補報並補繳所漏稅款者,主管稽徵機關應於受理之次日起六個月內核定。
第一項應由主管稽徵機關核定之案件,其無應補繳稅額或無應退稅額者,主管稽徵機關得以公告方式,載明按營業人申報資料核定,代替核定稅額通知文書之送達。

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