Voluntary payment of tax by a taxpayer and payment of tax withheld by a tax withholder as provided in this Act shall each be made with a paying-in-slip completed by the payer.
Payment of tax against demand notice issued by the collection authority as provided in this Act shall be made by the taxpayer within ten days from the date of receipt of the demand notice.

A profit-seeking enterprise having its head office outside the territory of the Republic of China which has been approved as in compliance with the provision of Article 25 or by application of the provision of that Article by the Ministry of Finance to compute its profit-seeking enterprise income tax in accordance with the following provisions:
1. For an enterprise having a branch office in the territory of the Republic of China, the branch office shall make the provisional tax payment and file a declaration on such provisional payment in accordance with the provision of Article 67 and at the close of the year, shall further compute the tax for annual settlement, make payment of the same and file annual income tax return in accordance with the provision of Article 71;
2. For an enterprise without a branch office but maintaining a business agent in the territory of the Republic of China, the business agent shall be responsible for withholding the tax. In the event that the business agent does not collect the price of goods pursuant to contractual agreement, it shall be responsible for reporting and paying the tax in accordance with the relevant withholding provisions or the payer shall withhold the tax at the time of payment under the approval of the competent collection authority;
3. For an enterprise having neither branch office nor business agent in the territory of the Republic of China, the payer shall withhold the tax at the time of payment.

A taxpayer may, at time of making provisional tax payment, offset there from tax withheld evidenced by withholding certificates and pay the balance in cash. Where the tax withheld exceeds the provisional payment, the portion in excess thereof may be offset from the tax payable for annual settlement for the same year.

The tax collection authority shall, after having determined the annual income of a taxpayer, make out and serve on him or her a tax demand notice giving the balance of the tax payable for the full taxing year after deducting the provisional payment, the tax withheld yet to be offset, the amount of credit tax as specified in the provisions of Paragraph 4, Article 15 , and the voluntary payment of tax made provided, however, that the withholding tax from the income subject to separate taxation in accordance with the Act shall not be deductible.
In case the tax as determined payable for annual settlement falls short of the total amount of tax paid, the collection authority shall make out and issue to the taxpayer a refund notice or an exchequer's check for refunding the overpaid amount of income tax.
If, thereafter any tax is decided upon as additionally payable or refundable pursuant to reinvestigation result, or a decision made on an administrative appeal or an administrative proceeding, the tax collection authority shall make out and serve to the taxpayer a tax demand notice, or a revenue refund notice, or an exchequer's check for refunding underpaid tax and for demanding the full payment of the tax payable. The taxpayer shall, within 10 days after service of the foregoing tax demand notice, make the full payment of the income tax payable by him/it.
In the case of refund as provided in the preceding two Paragraphs, the tax collection authority shall, promptly and no later than ten days from the date of verification, fill out and serve to the taxpayer an over-paid tax refund notice or an exchequer's check. The period for refund of overpaid tax shall be three months commencing from the date of service of the over-paid tax refund notice to the taxpayer. Upon expiration of the said refunding period, no refund will be made.
Where the amount of retained surplus profits declared by a taxpayer under the provisions of Article 102-2 hereof is verified as being under-declared or overdeclared, the supplemental payment of the shortfall tax or the refund of the overpaid tax shall be governed by the provisions set out in Paragraphs One through Four of this Article.

(Deleted)

In the case where the items or the amounts of tax exemptions and various kinds of deductions declared in the annual income tax return filed by a taxpayer subject to consolidate income tax, or the deductions of various kinds of costs, expenses, losses, or investment tax credit declared in the annual income tax return filed by a taxpayer subject to profit-seeking enterprise income tax exceed the limitations prescribed by this Act and other subordinate acts, or other laws and thus the voluntary payment of tax falls short, the amount of tax as determined by the collection authority as additionally payable shall be levied and together with the interest to be calculated on a daily basis at the banking interest rate as specified in Article 123 hereof deposit from the date immediately following the expiry date prescribed for filing annual income tax return until the date of payment. However, the interest to be charged shall be limited to the amount accruable for a period of one year.
In the case where the amount of interest to be charged under the preceding Paragraph does not exceed NT$1,500, such charge shall be exempted.

The provisions of all Sections and Articles of this Chapter relating to the computation of various time limits shall apply mutatis mutandis where the fiscal year comes under the provision of Article 23.

A taxpayer may appoint a legally registered accountant or any other lawful agent to act on his behalf in such matters relating to income estimation and filing of statement, income return, application for reinvestigation, administrative appeal or administrative proceedings as provided in this chapter. The measures governing such appointment shall be prescribed by the Ministry of Finance.
The annual income tax return of a profit-seeking enterprise within a certain scope shall be examined and signed by a legally registered accountant or any other lawful agent appointed by the profit-seeking enterprise. The regulations governing such appointments shall be prescribed by the Ministry of Finance.
In the case of business income tax return filed and signed by a legally registered accountant or any other lawful agent, the profit-seeking enterprise may enjoy the various benefits conferred by using the Blue Return in accordance with this Act.