Request our Free Fully functional single-user version of QuickBooks Point  of Sale.  After you install it, you can activate a 60-day free trial of Pro in the Help menu. After you activate it, you must register it to turn on the Pro features. You can Enter and use your own real data as well as process credit cards with a POS merchant account.

After 60 days it reverts to the free version of QuickBooks Point of Sale 10.0. If you choose not to purchase POS after the trial ends, it’ll convert to the free version which will still allow you to ring up sales, process credit cards (if you have a POS merchant account) and send sales data to QuickBooks, but will no longer track customers or inventory.