1-3 months. It usually takes one to three months for an individual to file his own personal income tax, and the time limit for approval is 30 working days. According to Article 12 of the Individual Income Tax Law. Taxpayers obtain business income, calculate individual income tax annually, and submit tax returns to the tax authorities within 15 days after the end of each month or quarter, and pay taxes in advance; The income shall be settled before March 3 1 of the following year. Taxpayers' income from interest, dividends and bonuses, income from property leasing, income from property transfer and accidental income shall be calculated on a monthly or quarterly basis. If there is a withholding agent, the withholding agent shall withhold and pay taxes on a monthly or quarterly basis.