In pre-plague days, you needed an application form, your passport, a photocopy of your passport info page and visa stamp page, and photos to extend.
Is that the same now, or is anything else required?
This will be my first extension this trip. Am I correct that I need a normal extension before I can get a Covid extension?
And, finally, what additional paperwork did the Covid extension require?
TLDR : Answer Summary
To extend a tourist visa in Thailand, you'll need an application form, your passport, and photocopies of your passport's data page and visa stamp page, along with passport photos. For a Covid extension, before applying, you typically require a normal extension. Required documents for the Covid extension may include a signed copy of your passport data page, a passport photo, proof of filing a TM30, a signed copy of your departure card (TM6) and latest entry stamp, and any previous Covid extension stamps if applicable. The required forms include TM7, STM2, and a form stating your reason for staying due to Covid, along with a fee. Document requirements may vary slightly by location.