Why do you only tell me that you need to pay 20% tax on account funds when you withdraw money?

Insufficient disclosure of information in advance allows people to understand how traders charge. 1. 20% of the dividend income tax must be paid in advance when withdrawing and must be paid to the Internal Revenue Service? 2. In addition, the system detects that there is payment not made in time, and the payment is limited to pay within 72 hou. It will fines 3% per day if you exceed the limited period. I said that I would take 20% to pay the tax first, but they said that this is not work, (to prevent tax evasion.... etc.) What is the situation, is it a fraudulent dealer??
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