[cflsystems]

Well I can't say much about how you do bookkeeping and reporting but what the mod does is to connect to WA DOR and "ask" what the total sales tax % is for that order for that shipping address - not just the zip code but the whole address so proper sales tax % is returned - zip code only will not always result in correct sales tax due to tax zones as you know. This is applied to the sale and recorded with the order. How you export and record orders from XC to your bookkeeping software is a completely different question.