Taxes? Freelancing with JFRV

Hi, I have a JFRV and can work without a permit which is what it says on my visa card.

I’m freelancing for Taiwanese companies. How do I report my income to Taiwan for taxes? Right now the payments are under $40,000 NTD.

2020 is my first full year working with the permit so just thinking about what to have prepared for next year. In the USA, where I’m also a freelancer, I just report it honestly.