Clickbait. From the article:
Via Bitcoin.com: According to a contract recently obtained by the Daily Beast, the IRS can now track bitcoin and other cryptocurrency addresses.
So, this is coming from the website (bitcoin d o t com) owned by Roger Ver (CEO of BCH). Yeah, this is most likely the next stage of FUD about Bitcoin coming from owners of the altcoin BCH, 'Roger & Co' . I wonder how much did they have pay to the "technocracy.news" team and the "shtfplan.com" team to put out those articles?.
But I highly doubt the IRS has broken btc anonymity, I think they'd rather spend all their resource to put some kind of regulations on Bitcoin, and it's going to happen soon or later, but to try to get rid of btc anonymity? I don't think so. If they did do it, then the darknet markets wouldn't exist.