The issue arises from the absence of an exemption certificate number entry. To resolve this:
If unable to transmit the credit note:
Go to eInvoicing, Configuration, Customers.
Key in the Exemption Cert. No.
If unable to transmit -self-billed invoice:
Go to eInvoicing, Configuration, Company.
Key in the Exemption Cert. No.
If it is a foreign buyer and does not have an exemption certificate, please fill it out below:
TIN: EI000000000020
Exemption cert no: NA