Follow-up question: would an American applying in Taipei have to provide IRS tax documents and other nonsense? Seems applying in USA has tons of extra document nonsense like IRS tax documents, but do Americans applying from other consulates or embassy’s (ie Taiwan, Cambodia, etc.) have to provide it?
TLDR : Answer Summary
An American applying for a Thai visa in Taipei does not need to provide IRS tax documents. The application process in Taipei is reported to be relatively easy with fewer document requirements compared to applying in the USA, where tax documents may be requested. Specific details about the application process can be found on the Thai embassy's website.