I am looking to transfer from One QBO company to a second one, all data from a specific point in time and on. What is the easiest and most efficient way to do that?
Let me give you some insights about QuickBooks Online @ahacoen. To have another company, you'll need to have a new QuickBooks Online account. It isn't possible to have multiple companies under one QBO account. That's why you won't be able to transfer the data from one company to another.
From QuickBooks, you can export your data lists to Excel. Then import it manually to your new QuickBooks Online account.