The most important features to look for in a digital piano for recording are sound quality, number of built-in sounds, and connectivity options. Look for a piano with weighted keys that mimic the feel of a traditional piano and provide a realistic sound. Additionally, the more built-in sounds a piano has, the more versatile it will be for recording. Lastly, connectivity options such as USB, MIDI, and Bluetooth allow you to connect the piano to your computer, making it easy to record and edit your performances.