Quicken and QuickBooks are both products of Intuit Corporation, and the programs are compatible with one another. If you've been keeping track of your business accounting records in Quicken, you don't have to start from scratch when you begin using QuickBooks. You can transfer your Quicken records right into your QuickBooks program.
Prepare Your Quicken Data for the Transfer
You cannot use your QuickBooks company file in Quicken. If you think you'll want to reopen your company data in Quicken, make a copy of your Quicken file to use in the transfer to QuickBooks and leave your original Quicken file intact.
Perform the Conversion from Quicken to QuickBooks