Why does Time not accept my employee´s phone number when she trys to accept my invite?

I'm glad to see you here in the Community, MDY. I want to help ensure your employee can accept the Time invitation.

You might want to ensure you're entering the correct phone number format before sending the invitation. Also, your employee needs to do the following:

• Be on the lookout for a text message with the invite.
• Accept the invite.
• Create a user ID and password (if they haven’t already).
• Download the QuickBooks Time app.

You can refer to this article for more details: Set up your employees to track time with QuickBooks Time. 

If you're using QuickBooks Time tracking application, performing the recommended basic troubleshooting steps will resolve the issue. Here’s how to do that:

1. From More Options ⋮, select Settings.
2. Then select Refresh Data.
3. Choose Yes.

In case you need to add a member in QuickBooks Time, the following write-up will provide you the step-by-step process: Add and manage team members in QuickBooks Time. Even if the articles are for QuickBooks Online US, the same process can be applied to your International account.

I've got your back if there's anything else I can help with. I'm always here to lend a hand. Have a nice day!