We already know that cryptocurrency exchange Coinbase really wants its users to pay taxes on their holdings. Now it’s unveiled a new tool to more easily calculate how much money you owe Uncle Sam for all those profitable bitcoin trades. The government is profoundly hip to cryptocurrency, taking steps to implement and regulate its use for formal purposes like paying tax. It’s also paying deadly attention to people who might be hiding their wealth in crypto assets, which is why the IRS ordered Coinbase to hand over information on nearly 15,000 users it identified as moving more than $20,000 through crypto; it ended up going to court late last year.…