Previously Translator worked correctly with Retail Express where turned off the taxes setting in WooCommerce. The tax invoice is generated by Retail Express and can be different from Woo's calculation . This is set under the General Tab in Woocommerce / Settings.
This example below the setting is on and needed to be turned OFF (Not ticked)
This is no longer the case and we can now support WooCommerce Taxes. Please note they need to be set up correctly with the tax amount INCLUDED in the amounts.