Final answer:
The AICPA allows auditors to provide tax services, consulting services, and prohibits advertising services for nonpublic companies.
Step-by-step explanation:
The AICPA allows the auditor to perform the following services for an audit client (nonpublic companies):
- Tax services: The auditor can provide assistance in preparing tax returns and offering tax planning advice.
- Consulting services: The auditor can offer advice and guidance on financial management, risk assessment, and internal controls.
- Advertising services: The auditor is not allowed to perform advertising services for an audit client.