Welcome to Upwork. If you are able to submit proposals, it means you profile is accepted. Also, you should have received an email that your ID has been verified.
Thanks for reaching out to us. Please advise as to which country your account should reflect as your location and we'll update it from our end?
I have updated your country as requested. You should now be able to update your address by going to your settings page and updating your address in your Contact Info page.
I started signing up for while I was living in the U.K., although now I am in the U.S. The country box is greyed out, and I am unable to edit or verify a phone number since I don't have a U.K. phone, please help.