第一項
この法律は、所得税について、納税義務者、課税所得の範囲、税額の計算の方法、申告、納付及び還付の手続、源泉徴収に関する事項並びにその納税義務の適正な履行を確保するため必要な事項を定めるものとする。
This Act provides for taxpayers subject to income taxes, the scope of taxable income, the way of calculating the amount of income taxes, and the procedures for filing income tax returns, making income tax payments, and issuing income tax refunds, as well as making the necessary provisions for ensuring the proper performance of income tax payment obligations.