You can lock multiple invoices and calculate taxes based on the tax calculation
            method. This action allows you to process one or many invoices that appear on the
                Ready to Lock page (status='Pending'). Tax calculation is
            determined by a setting on the invoice option (). For more information about tax calculation in the system, see Invoice Options for Locations.There has to be invoices created
                and in the 'Pending' status to complete this task.