Can I file multiple returns with one account?

It says on their "tax-preparer" page that "You'll need to make a new account for each tax return" - https://www.freetaxusa.com/tax-preparer

but I also saw this comment from one of the Tax Pro's in an old post -

"you are able to create multiple accounts in our software, if needed for your situation. You can use the same contact information (email address and phone number) but are required to choose a unique username for each account. We do not have a way to link separate accounts or transfer information between accounts, so it will be up to you to keep track of the various usernames you have created and the tax years each account is associated with." Here's the link to it if you want more context