A40. You may identify a specific unit of virtual currency either by documenting the specific unit’s unique digital identifier such as a private key, public key, and address, or by records showing the transaction information for all units of a specific virtual currency, such as Bitcoin, held in a single account, wallet, or address. This information must show 1 the date and time each unit was acquired, 2 your basis and the fair market value of each unit at the time it was acquired, 3 the date and time each unit was sold, exchanged, or otherwise disposed of, and 4 the fair market value of each unit when sold, exchanged, or disposed of, and the amount of money or the value of property received for each unit. A cryptocurrency exchange is a company that facilitates cryptocurrency transactions. A cryptocurrency exchange facilitates the purchase and sale of cryptocurrencies only.