What are the reporting requirements after 90 days in Thailand and how can I obtain a COVID-19 extension?

I received 2 covid extension after my initial 30 day extension. Both with 60 days straight up .

Yes got Covid19 extension after TR visa extension and then non O. All at koh phangan

Thai immigration give first "normal" 30d extension. After this can apply Covid 60d extension. In my case immigration (Bangkok) gave me 30d Covid stamp. Last day i went back and they give another 30d stamp.

1. It's not a form. It's a report you have to do every 90 days you are in Thailand. If you are on a tourist visa or visa exempt and asking about Covid extensions, then you may not need to do it. Each office is different about if they require people using Covid extensions to do the 90 day report or not. You'll need to ask your local immigration office. If they do want it, you need to have a TM30 registered in order to do it.

2. I believe every immigration office in Thailand is giving an "under consideration" stamp when you apply for Covid extension, meaning you will have to return between 5-30 days (depending on the office) to get the rest of your time.