To apply for a Certificate of Entry (COE) form for traveling to Thailand, you can do so online through your local Thai Embassy or Consulate. Visit the official COE application site at https://coethailand.mfa.go.th/ to gather the necessary documents, fill out the application form, and upload the required documentation. The process is straightforward, and there are helpful resources available online, such as YouTube channels that offer guidance on COEs and related travel protocols.
Tony *********
Your local embassy or consulate
Mark **********
The You Tube channel “Always on a Journey” has some excellent content on COEs generally and Phuket Sandbox program specifically. At bottom go to the site recommended in the comments, pull your docs together, fill out the form and upload pics of the documents requested. It’s a pretty straightforward process with a few tips (e.g. be sure to click to upload documents as instructed). Good luck to you.