When reporting personal income tax on mortgage, you need to follow the following steps:

Prepare relevant certification materials: you need to prepare relevant certification materials such as house purchase contract, mortgage repayment record and house property certificate.

Fill in the personal income tax return: When filling in the personal income tax return, you need to select the option of "mortgage interest" in the column of "special additional deduction" and fill in the following information: loan bank name, loan account number, loan term, loan amount and loan interest rate.

Submit the declaration form: after completing the declaration form, it needs to be submitted to the tax department for review.

Waiting for the audit result: the tax department will audit your declaration form, and after the approval, your mortgage interest expense can be deducted from the personal income tax.

It should be noted that the personal income tax on mortgage involves your tax return and interest expenses on housing loans. It is recommended that you read the relevant policies and regulations carefully before filling in to ensure the accuracy and completeness of the information.

To sum up:

To fill in the personal income tax on mortgage loans, you need to prepare relevant certification materials, fill in the relevant information in the personal income tax return form, and finally submit it to the tax authorities for review. You need to pay attention to the accuracy and completeness of the information in the process of filling in, so as to ensure that your mortgage interest expenses can be deducted correctly in personal income tax.

Legal basis:

Article 5 of the Individual Income Tax Law of People's Republic of China (PRC) stipulates: "Under any of the following circumstances, individual income tax may be reduced. The specific scope and time limit shall be stipulated by the people's governments of provinces, autonomous regions and municipalities directly under the Central Government and reported to the Standing Committee of the people's congress at the same level for the record: (1) the income of disabled, lonely and old martyrs; (2) Having suffered heavy losses due to natural disasters; (3) Other circumstances in which tax reduction can be stipulated by the financial department of the State Council. "