You can invite teammates to join your current account from your Team Settings page.
Go to your Team Settings page
- Click on your Profile picture>Set up this team> Users>Team members
- Add the teammate email address in the 'Work email' field
- Pick a role for this person (Learn about Roles and Permissions here)
The teammate will receive an invitation to join your company account.
If your teammate can't see the email, make sure it's not in their email junk folder