re: "I'm a US citizen, but I'm currently overseas. I was hoping to join Upwork to keep some income flowing. Is this possible since I forgot to verify my number before leaving?"
Upwork's profile pages do not actually identify freelancers based on their citizenship, nationality, or country of origin.
You may ask Upwork Customer Service to help you set your profile location to the city and country where you live right now. Or perhaps a Forum Moderator will help you do that.
If you are asked by Upwork to do some sort of location or identity verification, then you may use your passport or other government-issued identification.
When you return to the United States, then you may contact Upwork Customer Support again and ask them to help you change your location to the United States.
Given the fact that you are not in the United States right now, and you are not actually living in Los Angeles as your profile page claims, your profile page is in violation of Upwork ToS and could lead to an account suspension.
Out of curiosity, what country do you live in now?
If you are currently not in the United States, you can still apply to join Upwork as a freelancer. Location information on your profile has to reflect your actual location, however. Let us know what country you need to have your profile set at and we'll be happy to update it for you. Please, also note that you're responsible for making sure you have the necessary visa type or work permit to work in the country you're currently residing in.
Creating my account I accidentally chose a wrong country and saved settings. I need to change it but I can't because it's greyed out. I'm a resident of Russia and now I'm in this country as well, but in my profile it's China. How can I change it?
I chose a wrong country by mistake at the time of registration. Now, I need to create my profile and I cannot change the country. Even when I try openning the settings page using other links, it goes straight to my profile creation page. It is problematic, since the next step is phone verification and my country is different. How can I fix that? Thank you.
I just realized that I cannot register with this country (tried with a different device). I think I'll need to ask you for a location change once I go back abroad. If there is any other way, please let me know. Thank you.