EDGX showed me about 160,000 USDT, then demanded a tax payment before withdrawal

I started trading through EDGX and after about two weeks the account displayed profit of around 160,000 USDT. When I tried to withdraw, I was told that I could not access the funds until a tax-related payment was made.

The demand came only after the balance had grown and I tried to take money out. That changed what looked like a successful trading account into a situation where I was being asked to send more money.

I would not make an extra payment to release a displayed balance without independent confirmation of the platform, the tax requirement, and the destination of the payment.