It isn't connected to email addresses its connected to IP addresses. Which is something every device that connects to the internet has due to government regulations. I use H&B and the business program. I put h&b on 2 computers and efile 10 returns. I also did this again for 2023 taxes no issues. My online intuit account has nothing to do with the limit on efile. Only the license code is is limited to 5 uses . Been using turbotax for 9 years. I help people put the program on 2 computers all the time and efile all their returns. So if you are having trouble e-filing after installing on a 2nd computer you may have other issues.
