To cancel E-invoice on web, please follow below mentioned steps:
Step 1: Click on E-invoices under Sales, Search E-invoice and Click on Delete.
Step 2: Click on Cancel.
Note:
1. E-Invoice can be cancelled only within 24 hours of creation.This action cannot be reversed.
2. E-Invoice cannot be editable once created.
3. E-Invoice will not be cancelled on cancellation of original document in other sections.