Can I link more than one CPA, tax preparer or other third party to my tax accounts? Yes, multiple third parties may be liked to one account. March 30, 2017 15:07 Related articles As a third-party taxpayer representative, do I need separate logons for access to each of my clients? TNTAP: Gaining Access as a Third Party How do I manage additional login IDs? What kinds of access exist in TNTAP? I am a CPA or tax preparer. How will I gain access to my clients’ accounts?