TL;DR — Quick Summary
Fix errors generating returns and credit notes in CONTPAQi Comercial: CFDI relationship types, inventory, and SAT stamping.
Fix errors generating returns and credit notes in CONTPAQi Comercial: CFDI relationship types, inventory, and SAT stamping.
Go to Sales > Returns or Credit Notes. Select the original invoice, set relationship type (01 for credit, 03 for return), and stamp the CFDI.