Vertex Calculations on Credit Returns

JeffW

Member
My company is currently using OneWorld XE Update 7 along with Vertex Q Series. Vertex calculates sales tax based on the rates that are applicable on the date of invoicing. Here is the scenario I need help with:
A customer orders a product that is shipped and invoiced in July. The sales tax rate at the time of invoicing is 5%. In August the customer calls to return the product. We enter a credit return in JDE to credit the customer for the product and the sales tax. The issue encountered is that the sales tax rate changed to 6% on August 1st. If I invoice the credit return, the customer is getting credit for the product + 6% sales tax even though he only paid 5% tax on the original order. Since Vertex is always getting tax rates based on the invoice date, how can I get the correct sales tax on the credit return order?
Any help would be appreciated. I'm wondering how other companies handle this situation?
 
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