Generally, there is no easy way to convert from one software to another. As we have done thousands of conversions, we have developed a proven system.
Because of our experience, we can know the pitfalls that can usually occur on any data conversion. We plan out ahead the order of the data imports as well as spend time cleaning up the data to ensure it will import correctly. In many cases, some old data can be cleaned up or deleted before being imported into QuickBooks.
We also can assess the need for any 3rd party application that might be needed to add the functionality that may be missing in QuickBooks that was used in the prior system.