Click on the person icon in the top right of your screen and select Account

Navigate to the Members tab and click on Invite member

Input the email address, first name, last name, select a team tag and then the Subscription.

The panel on the right will show the estimated costs if they accept the invitation and from here you will need to confirm that you understand the charges.

In the bottom right select Invite.

An email invitation will be sent to the user.