Sage 100

Invalid Tax Codes: I have a customer who in SO (v4.3) is periodically receiving messages about invalid tax codes. Ruling out the obvious - that they don't have a valid tax code (which from my experience Sage traps for during data entry) -- have you seen any other reasons ""Invalid Tax Code"" would recur in Sales Order / Invoice Entry?

Not sure if it's actually trapped during data entry IF there is at least something in the Customer and/or Shipto tax field. It traps for BLANK, but possibly it doesn't validate if there is something in there. So maybe they deleted a code they used to use?

I have a client on 4.3.0.23 that has a (now) non-existent tax schedule set as the default for some customers in Customer Maintenance. When they post invoices, there are records in AR InvoiceHistoryHeader and AR_Open that are missing taxable/nontaxable amounts. Just dealt with this yesterday. I lived in DFDM for a while correcting the records and adding records to AR_SalesTax. Why MAS did not prevent the tax schedule from being deleted when customer records used them and why errors aren't thrown during invoicing strikes me as just wrong. And yes, the customer was given homework to change the default tax schedule for those customers.