The phone number of QuickBooks Customer Service is 1877-683-3280. The customer service number for the sales team is open Monday to Friday 4:00 am - 6:00 pm and Saturday/ Sundays, 7:00 am to 4:00 pm. (Pacific Standard Time). To know about how Quickbooks software work, a 30 days free trial on Quickbooks software is provided but note that the free trial version comes with all the premium features. If you have made a basic plan purchase after the free trial, most of the features may not be available and you will have to pay additional fees to get those features. Other information regarding the products, online training, video tutorial classes, frequently asked questions, contact the Quickbooks technical support and get the assistance.