The reasons why unit tax information cannot be queried across regions in the tax bureau:

1. Reasons for permission settings. In order to protect the privacy of taxpayers, provincial bureaus generally have different permissions for various positions in tax bureaus at all levels.

2. Reasons for system information sharing. At present, the tax declaration system and management system of the tax bureau are based on provinces, and the unified use of one system across the country has not yet been achieved, so it is restricted by the degree of information sharing.