Try to attach the file again and take notice of a pop-up informing you that your file size is too large. Resize the file to be less than 3 megabytes and then it will upload. Hope this helps.
You can keep your US phone number if you pay the monthly plan. I live in Thailand 6 months a year and tried a few different methods to do 2 factor authentication that did not work well. I switched to T-Mobile lowest cost plan so I can switch between SIM cards in Thailand to do 2 factor authentication.
I paid my US property taxes in January 2022, 2023 and 2024 while in Thailand. I used a PC for this. I don’t recall any issues using my PC.
Paid US federal taxes in April from Thailand using my PC.
I have a desktop PC in the US that I connect to remotely, but this is a bit cumbersome at times.
I had to change to T-Mobile so I can receive text messages while in Thailand at no extra charge. All my banking and financial accounts require the 2 factor authentication. I just switch between AIS SIM and T-Mobile SIM as needed.
I use SurfShark VPN as needed.i just bought an Apple MacBook Air to see if it is better.
I have YouTube TV, Prime Video, Max and many others with SurfShark VPN for all my US television viewing.
My Thai wife and I spend the winter 6 months (179 days) in Thailand annually.
It took plenty of trial and error to get this collection. Ongoing learning.