There are three reasons for this: 1, and the company's financial personnel are not professional and can't calculate individual taxes. After all, it is progressive now, which may be wrong. That is, the problem of the company, zero declaration or even no declaration. 2. Because the calculation company of individual tax is the pre-tax deduction of 5,000 special additional deductions-personal payment of three insurances and one gold, maybe this figure is zero every month, which is correct. If there is a problem, it can be settled in the end, but what should be paid must be paid, otherwise it will be in big trouble, not only the problem of paying taxes and fines, but also included in the integrity file. The process of individual tax declaration is: 1. Taxpayers go to the tax service hall of the competent tax authorities to receive paper personal income tax returns. 2. Taxpayers should fill in the declaration form in duplicate as required. 3. The taxpayer shall submit a copy of the declaration form and identity certificate directly to the tax service office of the competent tax authority. 4. Taxpayers pay taxes with the tax payment book issued by the tax authorities. 5. Taxpayers should keep a return for future reference. 3. The reason why the tax deduction declaration is 0 may be because there is no need to pay tax, so the declared tax amount is 0. Taxpayers should submit tax returns and pay taxes to the tax authorities within 0/5 days of the next month after obtaining the income. If the taxpayer obtains taxable income and the withholding agent fails to withhold it, the taxpayer shall pay the tax before June 30 of the following year.