Hi @Inspire12
I would suggest waiting until 1st April 2016 to import everything if your year end is 31st March. That way it can be a complete switch over (and hopefully smoothly), and help avoid confusion. Although, you don’t need to wait until then if you wish, you just need to decide on a date for the switch over.
At that point, you would need to import a trial balance from Quick Books:
And as @Glenn suggested above, adjust the balance of the debtors to account for any invoices raised in Quick File.
If you need help setting up, it may be worth having a chat to an accountant. If you don’t have one of your own, you can send an email via your QuickFile dashboard. Look for this button (on the right hand side):
Hope that helps!