The proforma invoices shouldn't be send to Avalara. Sage X3 needs to communicate with Avalara with the purpose of calculate the tax amount but a proforma is not a tax invoice. So the invoice can’t be send to Avalara as a “normal” sales invoice.
The invoices to others countries (export) shouldn't be send to Avalara for tax calculation. We should have a parameter or something to allow the possibility to exclude the export invoices.
Consequences of this issue : Due to the volume of invoices being…