QuickBooks Error Code 6000 80, most of the 6000 series errors are related to the company file and appear when you try to access the company file in QuickBooks. The error message that pops up on Windows shows “Error -6000, -80: We would appreciate you calling our support team at +1-855-738-0359 if you need help troubleshooting Error 6000 -related queries. Our talented team of experts is there to help you resolve this error and continue running your operations smoothly.