We want to create correction invoices to give a customer credits by changing tax to non-taxable on AR invoices. The Tax on the correction invoice is not correct and is always 0.00 instead of a negative value. Anyone has this experience and can help? Thanks a lot.
Tax is a calculation value based on the line value.
I think it maybe better to create a Credit Memo for the customer to cancel the first invoice and then recreate a new invoice.