TNTAP: Gaining Access as a Third Party If you are a CPA and need to create a logon for the first time, please watch this video. If you need to gain access to an account, please watch this video for instructions. November 19, 2018 15:29 Related articles I am a CPA or tax preparer. How will I gain access to my clients’ accounts? What information do I need to create a TNTAP login or gain access to an account in TNTAP? I’m a CPA or tax preparer. Can I register as my client, the taxpayer, in TNTAP? Creating a TNTAP logon Who do I contact if I need assistance?