If DeFi is the Ying in the crypto world, new I.R.S. reporting obligations are the Yang. I.R.S. reporting requirements for cryptocurrency and other digital assets have been substantially expanded, and as a result, are expected to have a significant impact on the wide range of businesses and individuals to which they apply. Among other things, information reporting requirements for certain brokers now include digital assets, and digital assets valued at more than $10,000 are treated as “cash.” Lawrence S. Feld, a New York attorney whose practice concentrates on Federal and State criminal and civil tax controversies, explains all.