[capableweb]

I think you misunderstand. Transactions happening on most blockchains are public, meaning if I send a transaction on the network, if others know my address, they know it was my transaction.

Tornado Cash allows you to sever the tie between addresses on the Ethereum blockchain, so I don't have to have my transactions public, all while still being able to legally declare my taxes as if I didn't use Tornado Cash at all.