If I can venture a guess, someone contacted you over Telegram or some other social media and told you about an easy way of making money, getting bonuses, quality airdrops, or some similar scheme like that. Whenever you get PMs with offers like that, delete, block, and report is the proper way to deal with them. As the old saying goes, there is no such thing as a free lunch. No one is going to help you make money, but they will use you to make them money.

There is no such thing as having to pay taxes before you can withdraw from an exchange. It doesn't even make sense. If I had to pay a tax trying to withdraw my xx from an exchange, why can't the exchange deduct x from my withdrawal amount for the tax and send me the rest? The fact that they are asking you to deposit more money is a sure sign they are trying to scam you and steal as much as they can before you figure out what is going on.