Dear All, I create a billing (No# 6000023) refer from a Sales Order and in line item 42 I found tax condition type give it's value although there's no value calculate for that item. This tax value doesn't appear in the Sales Order, so I cancel the Invoice and then create the new billing (No# 6000025), the result is the tax value is disappear, although i don't make any changes at all. This case also occured for several times from a couples of months ago. My question, why this case may happen? Please kindly help. Thank you.
