1. Causes the tax authorities to investigate the person who uses the ID number: If a person uses someone else's ID number for tax declaration, the tax authorities may investigate the person who uses the ID number. This may bring trouble and unnecessary trouble to the person who uses the ID number;

2. Affect the credit history of the person who uses the ID number: If a person uses someone else's ID number to file tax returns, this may cause the credit history of the person who uses the ID number to be affected. Because the tax authorities may regard the person whose ID number is fraudulently used as a person suspected of fraud or dishonesty;

3. Causing the person who uses the ID number to suffer economic losses: If a person uses someone else's ID number to file tax returns, this may cause the person who uses the ID number to suffer economic losses. Because the tax authorities may punish or fine the person who uses the ID number, which may bring economic losses to the person who uses the ID number.

The steps of personal income tax account registration are as follows:

1. After installing personal income tax for the first time, open it and display it on the home page, and click on the Personal Center in the lower right corner;

2. You are not registered at present, so you have no login information. Click the Login/Register button at the top;

3. Since there is no account, you need to click Register;

4. The registration option pops up at the bottom. * * * There are two types. Select face recognition authentication registration;

5. Pop up the relevant agreement, and click the agree and continue button at the bottom after reading it;

6. Enter the ID number and name, and click the Start Face Recognition button;

7. Go to the face verification step. After successful verification, it is the registration interface. Enter your account number, mobile phone, password, etc. And registered successfully.

To sum up, if personal income tax is fraudulently used for yourself, it will definitely have an impact, and it will have an impact on some of your own credit information, which in turn will affect your own credit information.

Legal basis:

Article 2 of the Individual Income Tax Law of People's Republic of China (PRC)

The following personal income shall be subject to personal income tax:

(1) Income from wages and salaries;

(2) Income from remuneration for labor services;

(3) Income from remuneration;

(4) Income from royalties;

(5) Operating income;

(6) Income from interest, dividends and bonuses;

(7) Income from property lease;

(8) Income from property transfer;

(9) Accidental income. Individual residents who obtain income from items 1 to 4 of the preceding paragraph (hereinafter referred to as comprehensive income) shall calculate individual income tax according to the tax year; Non-resident individuals who obtain income from items 1 to 4 of the preceding paragraph shall calculate individual income tax on a monthly or itemized basis. Taxpayers who obtain income from items 5 to 9 of the preceding paragraph shall calculate individual income tax separately in accordance with the provisions of this law.