Article 69 of the KSA Income Tax Law stipulates the mandatory timeline for the settlement of tax liabilities. It establishes that a taxpayer is obligated to pay the tax amount due, as specified in their tax declaration, to the relevant authority. This payment must be completed within a period of one hundred and twenty (120) days. The commencement of this 120-day period is the day immediately following the end of the taxpayer's specific taxable year. This provision creates a clear, non-negotiable deadline, ensuring timely tax collection and compliance based on self-declared financial results.