Personal tax isn't paid if you're not tax resident, and OP seems to be resident in Thailand so will have to follow relevant laws there.

If ASEAN free trade's of benefit, perhaps. Or if going for a Singapore ID card then having a profitable business might be worth it. Or access to SE Asia finance. Outside these, Wyoming!

https://taxfoundation.org/location/wyoming/

https://taxfoundation.org/location/delaware/

For example.

But it's not just about tax. For privacy and having a Delaware-like specific business litigation process should you ever need it, Nevada's advantageous over Wyoming without needing much more in tax. Then for access to finance, a location that'll let you open a bank account for the business can be important (this might depend on US state). So there's a bit of YMMV, but nothing an Ask HN can't fix!

You generally pay personal taxes where you live, not where your company is incorporated.

Also, companies cannot directly and permanently employ people living and working in other countries without having a legal establishment there acting as the employer. Without a local legal entity to employ you, you'd have to register as self employed and then it doesn't matter for personal income tax where your customers are (It may matter for VAT though).

Some countries offer various temporary exceptions for expats, but the general rule is that you pay personal income tax and social security contributions in your country of residence.

I’m not saying it’s a terrible choice – I‘ve incorporated in Singapore and there are lots of advantages. But if you aren’t locally resident, there might be better options.