Supplementary Provisions, Article 32Transitional Measures Concerning Special Provisions on Calculation of Income for Business Income, etc. of Home Workers, etc.
第三十二条（家内労働者等の事業所得等の所得計算の特例に関する経過措置）
The provisions of Article 27 of the New Act on Special Measures Concerning Taxation apply to income tax for 2025 and subsequent years, and the provisions then in force continue to govern income tax for 2024 and earlier years.
新租税特別措置法第二十七条の規定は、令和七年分以後の所得税について適用し、令和六年分以前の所得税については、なお従前の例による。
A person who, before December 1, 2025, filed a final return under the provisions of Article 125 or Article 127 of the Income Tax Act (including the cases where these provisions are applied mutatis mutandis pursuant to Article 166 of that Act) for income tax for 2025, and a person who, before that date, received a determination prescribed in Article 2, paragraph (1), item (xliv) of that Act for income tax for 2025, may, where the application of the provisions of Article 27 of the New Act on Special Measures Concerning Taxation causes a change in the matters stated in that final return or the matters pertaining to that determination (or, where a reassessment prescribed in item (xliii) of that paragraph was made for those matters before that date, the matters after the reassessment), file a request for reassessment under Article 23, paragraph (1) of the Act on General Rules for National Taxes with the district director with regard to the matters in which the change has arisen, within five years from that date.
令和七年十二月一日前に同年分の所得税につき所得税法第百二十五条又は第百二十七条（これらの規定を同法第百六十六条において準用する場合を含む。）の規定による確定申告書を提出した者及び同日前に同年分の所得税につき同法第二条第一項第四十四号に規定する決定を受けた者は、当該確定申告書に記載された事項又は当該決定に係る事項（これらの事項につき同日前に同項第四十三号に規定する更正があった場合には、その更正後の事項）につき新租税特別措置法第二十七条の規定の適用により異動を生ずることとなったときは、その異動を生ずることとなった事項について、同日から五年以内に、税務署長に対し、国税通則法第二十三条第一項の更正の請求をすることができる。