Just tell me what asa id you want to burn.
The smart contract will opt-in to it and you can burn sending that asa there.
It will be ask you to sign two transaction, in which you will spend:
0.002 ALGO for tx fees
0.1 ALGO that the burn address must have for each asa opted in
0.2 ALGO as a protocol fee
The first time use the burn button to let the burn address accept the asa.
Then use the send button to effectively burn the asa.
(Of course you can use the method you prefer to send)