What paperwork is needed to work remotely in Thailand with a DTV application?

Hi,

I don't want to take up everyone's time so if somebody has gone through a similar process I would greatly appreciate messaging regarding some advice as what paperwork/support was needed.

I have a small business and would like to give myself permission to be a remote worker for a dtv application. I thought of using a visa service but I don't think there is much added value in that process. I have an upcoming trip to a nearby country and thought I would apply once I arrive.

For somebody that did something similar, what support did you need? Any tips on getting through the process?

Thanks!