Taipei increased scrutiny of SPers last year due to the rise of such bogus applications. Someone recently posted last month of applying there and being approved the same day and their husband approved the next day as a dependent. That level of speed was why Taipei was very popular 2024. As someone mentioned the agent handling your application comes into play.
I faced the similar same prob as a freelancer. I sent a letter to the Taipei embassy explaining the problem, they said apply with what you can, You could try similar, you can also upload business registration details of your client, which I did in the end.
Anonymous participant Anonymous participant Without submitting your business registration, you could apply via the freelance route. You would need to show a contract of employment, payments received on 6 months of bank statements, employer business registration, letter permitting remote work in Thailand.