I will leave for Laos next week at the end of my first 60-day multiple-entry visa time. I will return 5 days later. I have the immigration stamp on my US passport.
What paperwork or fees will I need to reenter Thailand? My 6-month visa expires at the end of March
TLDR : Answer Summary
When reentering Thailand after a visit to Laos on a multiple-entry visa, ensure you have the correct documents. If your immigration stamp is simply an entry stamp and not a visa, you will need to be aware that stamping out will cancel that entry. If you have an eVisa, print the PDF you received and present it alongside your passport. To extend your stay, consider visiting the local Thai immigration office to apply for a 30-day extension before your exit.