No. The IRS limits the number of returns you can e-file each year to 5 per e-mail address.
Simple returns can be done using TT Online Free. But are you a paid tax preparer?
I am not a paid tax preparer. I am doing all of my families returns (dad, sister, son, daughter, niece, nephew, etc.) as a favor. Counting my own, I am doing 9 returns. Can I do 5 returns on my computer with my email address and do the other 4 on my wife's computer and use her email address?
We don’t exactly know how the IRS enforces the 5 e-file limit, and it would not be appropriate for us to give instructions on how to bypass the regulation even if we did know. It is partly email-based, but may have other components. You will just have to take your best shot. If you can’t e-file, you can print the remaining returns and mail them to the IRS and the states.
Even if another household member buys a second license, e-File will check your IP address and you won't be able to e-File more than five times.
If you are on a VPN you may have better luck.