Once you verify, the tokens will leave the user's wallet and are put into a wallet (called a card) with Brave partner Uphold. If you want to convert the tokens to your local currency and put into your account, there's a "Know Your Customer" process that the government makes sure is enforced
Tax-wise, I'm not sure how that works (great question). Besides manually converting to your currency and depositing to your bank, Uphold has a debit card that will automatically do the conversion if you use it when shopping