Value-added and Non-value-added Business Tax Act Article 25

When a business entity, whose business tax is assessed as prescribed in Article 23, purchases goods or services for business operation, obtains evidence stating amount of pertinent business tax, and files a return as required, 10% of input tax shall be deducted from the assessed tax amount by the competent tax authority. However, when the assessed tax amount is less than the minimum amount for assessment, this deduction shall not be applicable.If, as provided in the preceding paragraph, 10% of input tax exceeds the assessed tax amount, the excess may be deductible in the coming period.
中文原文 加值型及非加值型營業稅法第25條
依第二十三條規定,查定計算營業稅額之營業人,購買營業上使用之貨物或勞務,取得載有營業稅額之憑證,並依規定申報者,主管稽徵機關應按其進項稅額百分之十,在查定稅額內扣減。
但查定稅額未達起徵點者,不適用之。
前項稅額百分之十超過查定稅額者,次期得繼續扣減。

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