1. Back up your Quicken file first. The conversion creates a new QuickBooks company file rather than modifying anything in Quicken, but you want a clean backup on hand regardless before you start.
2. Close any open QuickBooks company file. The converter only runs when you're not already inside a company file, since it's about to create a new one.
3. Go to File > Utilities > Convert from Quicken. This launches the conversion wizard.
4. Select your Quicken data file. Point it to the Quicken file (typically a .QDF file) you want to convert.
5. Let QuickBooks build the new company file. It maps your Quicken accounts, categories, and transaction history into QuickBooks' structure automatically.
6. Review everything before you rely on it. Check your chart of accounts, opening balances, and any lists that matter to you. Some Quicken data, investment and brokerage account detail in particular, doesn't map over, so plan to set those up fresh in QuickBooks rather than expecting them to appear.