Quicken recognizes a ONE Account’s cash management transactions as a “checking account” when you follow these steps:
From the Main Menu in Quicken, choose Tools gt; Accounts List.
Select your ONE Account from your accounts list. Then click the Edit button.
On the General Information tab on the Account Details window, choose “yes” to “Show cash in a checking account.” Quicken will prompt you to back up your data file.
Once the backup is complete, you will see an account created in Quicken with the same name you gave your ONE Account, plus the suffix “Cash.” This account will appear in the “Banking” section, while your investment information remains in the “Investing” section. Click the OK button to save your changes.
You can find additional information at Quicken FAQ.