Generally speaking, the promotion commission paid by the platform to the account is the after-tax income that has been paid, and there is no need to pay taxes again. If you are not sure, you can consult the platform background or customer service.
Taxation refers to a normative form in which the state participates in the distribution of social products in a compulsory and unpaid way in order to provide public goods to the society and meet social needs, and obtains fiscal revenue. Taxation is a very important policy tool.