QuickBooks Error -6123 falls under the category of 6000 series error code. Many users have reported that they are facing this issue while opening the company file. If you\’re also in the same boat, call us at (855)-756-1077 and get the best ways to solve QuickBooks problems. Our team is always prepared in advance to provide you with optimal solutions for QuickBooks problems. Our service is open 24/7 for you.