Please verify whether the deduction has been made without declaration.

If there is a problem with the system, it can be verified and handled through the technical support and customer service of the reporting system.

If it is determined that it is caused by objective reasons, you only need to make a supplementary declaration (technical customer service assistance is needed).

If it is not technically supported, it can only be verified and confirmed by the tax authorities, and the tax can be re-declared. If the tax is overpaid, you can apply for a tax refund.

Overview of personal income tax:

Personal income tax is the tax withheld and remitted by the company. The so-called withholding means withholding personal taxes on behalf of the tax authorities, and the so-called withholding means paying them to the tax authorities on behalf of individuals. Withholding and remitting shall be collected and accounted by the "Taxes Payable-Individual Income Tax" account. The procedure is to calculate the tax payable by everyone when the enterprise pays wages, and count it into the credit of the taxable amount-personal income tax. At this time, the personal income tax to be paid by the individual is deducted from the salary. Therefore, when paying, it is paid directly through the company's bank account with the payment book, and then included in the taxable amount-personal income tax. Simply put, the company keeps the tax deducted from employees in the company's account (usually by paying less wages), and then uses the company's account to pay taxes.