QuickBooks Online 2021. net beginning balances customers, vendors and products and services. Let’s get into it with Intuit QuickBooks Online 2021. Here we are in our get great guitars practice file now that we have our company file set up, the next thing we want to think about is whether or not we need to bring financial data into this QuickBooks system from another accounting system. In other words, do we have beginning balances that are coming from a prior accounting system that we want to put in place in the current accounting system.