Section 65 Taxable income under this Part is net profit which is calculated by deducting income from business or income arising from business carried on in an accounting period with expenses in accordance with conditions prescribed in Section 65 Bis and Section 65 Ter. An accounting period shall be twelve months except in the following cases where it may be less than twelve months:
a newly incorporated company or juristic partnership may elect to use the period from its incorporation date to any one date as the first accounting period.
a company or juristic partnership may file a request to the Director-General to change the last day of an accounting period. In such a case, the Director-General shall have the power to grant approval as he deems appropriate. Such an order shall be notified to the company or juristic partnership who files the request within a reasonable period of time and in the case where the Director-General grants the permission, the company or juristic partnership shall comply to the accounting period as prescribed by the Director-General.
The calculation of income and expenses in paragraph 1 shall use an accrual basis. Income arising in an accounting period, even though it is not yet received in such accounting period, shall be included as income for that accounting period. All expenses relating to such income, even though they are not yet paid, shall be included as expenses for such accounting period.
In a necessary case, a taxpayer may file a request to the Director-General to change the accrual basis and accounting method for the calculation of income and expenses under paragraph 2, and when approved by the Director-General, he shall comply with the accounting period as prescribed by the Director-General.