taxomate supports a single account having multiple users attached to that account. You can invite other team members to your taxomate account via email. They simply have to create an account and login. Sellers with CPAs/accountants, bookkeepers, and virtual assistants usual utilize this feature.
To add another user to your taxomate account, simply go to "Users" on the left menu bar and select Users
Enter your new account's email address and select "Invite". The new user will get an email invitation to the email address you entered!