The filing of an amended return that increases the tax amount payable that has already been determined does not affect the tax liability for the part of the national tax pertaining to the tax amount payable already determined.

①A tax return must be filed with the district director of the tax office with jurisdiction over the place for tax payment of the national tax at the time of its filing (hereinafter referred to as the "current place for tax payment" in this Article).

②With regard to a tax return for income tax, corporation tax, local corporation tax, inheritance tax, gift tax, land value tax, consumption tax on the transfer, etc. of a taxable asset, or tax for promotion of power-resources development, if the place for tax payment has changed on or after the time when the taxable period to which the return pertains commenced (for a national tax without a taxable period, the time when its tax liability was established), and the taxpayer has filed the return with the district director of the tax office with jurisdiction over a place for tax payment involved in that change, other than the district director of the tax office with jurisdiction over the current place for tax payment, the district director of the tax office with whom the return was filed may accept the return. In this case, the return is deemed to have been filed with the district director of the tax office with jurisdiction over the current place for tax payment.

③The district director of the tax office who has accepted a tax return referred to in the preceding paragraph must send the return to the district director of the tax office with jurisdiction over the current place for tax payment, and notify the person who filed it to that effect.

④Notwithstanding the provisions of paragraph (1), a tax return for consumption tax, etc. on goods received from a bonded area that is subject to the self-assessment system (hereinafter referred to as "self-assessed consumption tax, etc. on imported goods") must be filed with the director-general of the customs house with jurisdiction over the place for tax payment of that consumption tax, etc. In this case, for the purpose of applying the provisions of Articles 17 through 19 (Tax Returns), the term "district director of the tax office" in those provisions is deemed to be replaced with "director-general of the customs house".

If a tax return (including documents required to be attached to the return and any other documents required to be submitted in connection with the filing of the return) or any other document specified by the Commissioner of the National Tax Agency has been submitted by mail or correspondence delivery, it is deemed to have been submitted on the date shown by the date stamp on the mail or item of correspondence delivery (if there is no such indication, or if the indication is not clear, the date found to correspond to it based on the number of days normally required to deliver the mail or item of correspondence delivery).

①A person who has filed a tax return may request that the district director of the tax office reassess the tax basis, etc. or tax amount, etc. stated in the return (if a reassessment of such tax basis, etc. or tax amount, etc. has been carried out under the provisions of the following Article or Article 26 (Reassessment of Previous Reassessment) (hereinafter referred to as a "reassessment" in this Article), the reassessed tax basis, etc. or tax amount, etc.) within five years (10 years, in the case listed in item (ii) where corporation tax is concerned) from the statutory tax return due date for the national tax to which the return pertains if the person falls under any of the following items:

②A person who has filed a tax return or a person who has received a determination under the provisions of Article 25 (Determination) (hereinafter referred to as a "determination" in this paragraph) may, if any of the following items applies (for a person who has filed a tax return, limited to cases where the day on which the period specified in the relevant item expires comes after the day on which the period prescribed in the preceding paragraph expires), notwithstanding the provisions of that paragraph, make a request for a reassessment under the provisions of that paragraph (hereinafter referred to as a "request for reassessment") on the grounds that the item applies, within the period specified in that item:

③A person who intends to make a request for reassessment must file with the district director of the tax office a written request for reassessment stating the tax basis, etc. or tax amount, etc. after the reassessment requested, the reasons for the request for reassessment, the details of the circumstances that led to the request, the tax amount payable and the tax amount equivalent to the amount of a refund before the reassessment requested, and other matters that serve as a reference.

④When a request for reassessment has been made, the district director of the tax office examines the tax basis, etc. or tax amount, etc. to which the request pertains, and makes a reassessment or notifies the person who made the request that there are no grounds for a reassessment.

⑤Even if a request for reassessment has been made, the district director of the tax office does not grant a grace period for the collection of the national tax payable to which the request pertains (including the expenses for the delinquent tax collection procedure thereof; the same applies hereinafter in this paragraph); provided, however, that if the district director of the tax office finds that there are reasonable grounds, they may grant a grace period for the collection of all or part of that national tax.

⑥Notwithstanding the provisions of paragraph (1), a request for reassessment of self-assessed consumption tax, etc. on imported goods is to be made to the director-general of the customs house. In this case, for the purpose of applying the provisions of the preceding three paragraphs, the term "district director of the tax office" in those provisions is deemed to be replaced with "director-general of the customs house".

⑦The provisions of the preceding two Articles apply mutatis mutandis to a request for reassessment.

If a tax return has been filed, and the calculation of the tax basis, etc. or tax amount, etc. stated in the tax return did not conform to the provisions of the national tax laws, or the tax basis, etc. or tax amount, etc. otherwise differs from what the district director of the tax office has found through their examination, the district director of the tax office reassesses the tax basis, etc. or tax amount, etc. pertaining to the return based on that examination.

If a person who is found to be obliged to file a tax return has not filed the return, the district director of the tax office determines the tax basis, etc. and tax amount, etc. pertaining to the return based on their examination; provided, however, that this does not apply if the determination would give rise to no tax amount payable and no tax amount equivalent to the amount of a refund.

If the district director of the tax office becomes aware that the tax basis, etc. or tax amount, etc. reassessed or determined under the provisions of the preceding two Articles or this Article has been overestimated or underestimated, they further reassess such reassessed or determined tax basis, etc. or tax amount, etc. based on their examination thereof.

In the cases referred to in the preceding three Articles, if the relevant officials of the National Tax Agency or a Regional Taxation Bureau have conducted an examination, the district director of the tax office may make a reassessment or determination under those provisions based on the findings of that examination.

①A reassessment or determination under the provisions of Articles 24 through 26 (Reassessment and Determination) (hereinafter referred to as a "reassessment or determination") is made by the district director of the tax office serving a written notice of reassessment or a written notice of determination.

②A written notice of reassessment must state the following matters. In this case, if the reassessment is based on the examination referred to in the preceding Article, a supplementary note to that effect must be added.

③A written notice of determination must state the tax basis, etc. and tax amount, etc. pertaining to the determination. In this case, if the determination is based on the examination referred to in the preceding Article, a supplementary note to that effect must be added.