Make phone number an optional field in QuickBooks addon.

he QuickBooks program itself has limitations on phone number field length. The Amazon has changed their system lately and adds an extension number to each phone number. Due to this change, it becomes impossible to transfer Amazon orders automatically to Quickbooks unless the extension number is manually deleted from each sales order.
The possible solution is to make phone number an optional field in QuickBooks addon, if this field is not required in the QuickBooks software.