Data issues or overflow values in the QuickBooks can cause QuickBooks overflow error.

Reasons:
Account balance of the company field is greater than $9,999,999,999,999.99.
QuickBooks overflow error can be resolved by setting the group item quantity to naught. It can also be resolved by checking the one transaction which is overflowing and rectify the average cost.
For instant help in fixing QuickBooks overflow error, reach out to QuickBooks enterprise support at +1-888-485-0289