One lesson we can learn here is that we really have to be careful with matters on tax as the government is now really watching all of our moves and requiring us to pay some tax especially with gains. I never knew before that this simple transaction can be somewhat a little bit complicated. Good thing that here in my country the government is not yet that strict when it comes to taxes (but I am sure that time is coming when it will be requiring us to do the same).
If you dont like to experience headaches later then better to know first the laws of your country when it comes to taxation. Declaring anything as long you do gain and skipping out behavior isnt really a rightful thing to be done.
This thread is old and im sure OP's Ledger already arrived and also some points where keeping your coins on exchange wallets is always been risky.
No keys= Those coins arent yours fully.