This order only has standard inventory items.

Tax amount is $0.

No customer tax exemptions.

This order only has standard inventory items.

Tax amount is $0.

No customer tax exemptions.

Kevin gave you the link to a defect in Sage 100 doesn't matter what taxes are, what inventory items, customer tax exemptions.  It is a bug that was fixed per Kevin's link above.  It was if you had a miscellaneous item, comment on the first line of the sales order.  We fixed for versions 2024.1 & 2023.3.

I appreciate the link, but this is an Avatax issue and has nothing to do with the linked article.