Sometimes, you find that your business needs to keep track of more information about items, customers, vendors, or employees than QuickBooks has available fields for. Not everyone needs the same information, so it makes sense to be able to track what’s important to you. For situations like this, there’s a solution in the form of custom fields. These are fields that you can add to several of your lists, specifying what they’re for, and what type of data they can hold. You can even choose whether they’ll be required when creating a list element or a transaction.