Dear P'Kittipong,
The operation of tax payment via e-banking was completed already and at present we already made tax payment via e-banking for Phor Phor 30 krab.
But the filling of withholding tax we have some vendor (JNC Line-Singapore) that no number of tax id (13 digits) couldn't make such this item through the filling of Internet,therefore we have to use the method manual instead.
Whenever the vendor has tax id as above mentioned we can do it via Internet krab.