Tax Withholding Category vs Withholding Tax Type

[kurogeek]

ERPNext has a very well working withholding tax system built in and it is using Tax Withholding Category to set up WHT system. However, this app offer a way to print WHT certificate but this app does not use built in a Tax Withholding Category doctype. Instead, it uses Withholding Tax Type for the certificate to work. I would like to know what's the difference between these two doctype? Is it possible if we merge them together and only use the builtin Tax Withholding Category for simplicity?

[kittiu]

I considert existing Tax Withholding in ERPNext is different system from Thai Tax Withhholding.

For example, in ERPNext, it will deduct withholding tax fro Payment Entry which include VAT already. (i.e., 3% of 107 baht) which is not correct for Thailand.
But for Thai ways, we want to deduct only from invoice base amount (i.e., 3% of 100 baht). And so, if I am to use Withholig Tax Category, it is incorrect (on Payment Entry) and also confusing to setup.

Question whether we can resue the doctype? Well, I think it is also a complicated doctype, and many of which we don't use.

For Withholding Tax Type, it is only this,

Hope this clarify you.

By the way, the development in this repo will be freezed, as I am moving it to https://github.com/ecosoft-frappe/erpnext_thailand
There, will be more features than just Thai Tax. I.e., not it also has Sales / Purchase Billing (ใบวางบิล) amd more to come.