Can I kindly ask you to answer the below questions to ensure comprehensive support as usual:
1- Are you using our SDK tool?
2- Did you successfully onboard new device with your VAT? if yes, in which environment?
3- Are you validating simplified invoice?
Before validating a simplified invoice you need to sign the invoice using your PCSID, that ZATCA sent to you when you successfully onboarded.
The onboarding process is mandatory to ensure successfully of integration with ZATCA,
Please review the Educational Library shared on ZATCA site and these documents will help you to integrate successfully with ZATCA.
Thank you for your response,
we signed the simplified invoice by PCSID using .net SDK before validating and completing the onboarding phase also when we signed the simplified invoice by Java SDK using the same PCSID then sent it to Zatca so the response was accepted.