1. Report: You can report the tax evasion of training institutions to the local tax authorities or relevant departments, provide relevant evidence and explain the situation in detail. Reporting can be carried out through various channels such as telephone reporting and online reporting.

2. Investigation by tax authorities: The tax authorities will investigate the contents of the report to verify whether there is tax evasion in the training institutions. If the investigation results prove that the agency has tax evasion, the tax authorities will deal with the agency according to law, including fines, recovery of tax arrears, and withholding of illegal income.

3. Administrative punishment: In addition to the tax authorities, if the circumstances are serious, other departments may punish them. For example, the industrial and commercial department may revoke the business license of the institution or suspend its business activities.