1. Log in and enter the VAT invoice integrated service platform, and click Confirm Signature.

2. Prompt information pops up on the page. You need to enter the certificate password and the correct certificate password to confirm the check.

3. The password of the certificate entered here is the password of the tax license.

4. Be careful not to make mistakes five times, otherwise the tax plate will be locked.

5. Either the password is forgotten, or the broken disk is locked, so you need to take it to the tax bureau to reset it.