Hi, gary133.
I can guide you through the process of entering your number during the setup.
When clicking the invite link from the email your client sent, you'll need to change the default flag that indicates the country calling code. If you're in the Philippines, switch the flag accordingly so the correct number prefixes specific to your region show. Not to worry, formats such as +639xxxxxxxxx or 09xxxxxxxxx are acceptable.
Since you're opening a link in a browser window, ensure your browser is up-to-date or consider using an incognito mode to check if this is a temporary browser problem. Alternatively, you can utilize other supported browsers. Afterwards, enter the verification code sent to your number. If it fails, select Use different number and reenter the number.
Check out this article to learn more: What to do if you can't accept client invites in QuickBooks Online Accountant.
Let me know if you have follow-up concerns. We'll be here to assist you.
