Offering to provide a form 1099-B would be great for customers who never leave the Coinbase environment, but isn’t a solution for customers who transact with Bitcoin.
http://www.forbes.com/sites/kellyphillipserb/2017/02/09/blockchain-tech-ceo-says-tax-form-1099-b-wont-work-for-all-virtual-currency/#588001e13539
