You are trying to save a customer record and received error "custpage ava entityusecodelist contained more the the maximum number of characters"
This is caused by the Avatax bundle that is triggered when saving the customer record. When a custom field Avalara creates on the customer record gets too much data in it such as too many addresses to our entity/use codes.
- Go to the custom record AVAENTITYCODEMAPPING and delete at least one entry for the customer.
- The best way to exempt customers with a lot of addresses is to create an exemption certificate on the Admin Console or CertCapture, or uncheck the taxable checkbox on the customer record.