Unable to withdraw money and ask to pay 20% tax

I got to know the assistant from Line and said that there was a teacher who led the oil and XAU futures, downloaded MT4, and told me that the return rate was high, and there was no doubt that it was fraudulent. At first, the small amount of funds and the operation made good profits, and the assistant encouraged more funds to be more profitable. 10,000 Taiwan Dollars have withdrawn 11,000 US dollars. In less than a month, the final principal plus profit is 427,741.91 US dollars. I will withdraw 50,000 US dollars on 4/6, but I have been told that I have to pay 20% tax before I can withdraw. I feel that I have cheated. I haven't made a deposit, but I have previously deposited 1.2 million NTD, withdrew 900,000 NTD. The case number FX2007642900 was exposed in a week. I did not receive any information, so I reported again. Thank you [d83d][de4f] Please help me deal with it, I am very grateful!