In a way I'm surprised taxes don't ask for this information yet. They want to know your total balance of everything, and specifics for each bank account, but they're not asking about Bitcoin addresses yet. That's probably because their system can't handle it, but at some point they'll no doubt be that intrusive. It's already a security risk having to disclose what you own, especially considering how many tax employees would be able to access this data.
What a shame that you accidentally lost a bunch of your paper wallets Loyce! You'll need to be more careful in future. Here's hoping you find them again in 10 or 20 years' time.
I think they are not in a hurry because at any time they can link our addresses to us, as blockchain is immutable. A small privacy slip when making a transaction is forever in the blockchain and you cannot fix it.
For example, if you sent Binance some bitcoin 4 years ago, Binance can share this address with tax employees at anytime. And if you spend that balance with another address, that another one is linked as well.