If you have a business account with BDTax, you can add multple user to prepare tax for your company.  Please see instruction below to add new user.

Steps to add user to your business account:

1.  Log into BDTax as business account admin user.

2.  Click My Users - Add User.

4.  Enter user info.

5.  Select Assigned Role as Company user.

6.  Click Create.