If your annual aggregate turnover exceeds RS. 20 Crore then you are required to generate e-Invoices. In case if you are still not enabled, you need to follow the following steps:
Step 1: Go to https://einvoice1.gst.gov.in/
Step 2: Navigate to ‘Registration Menu’ and then select ‘e-Invoice Enablement’ option.
Step 3: Enter your GSTIN credentials. Now you’ll receive the OTP on your registered mobile number.
Step 4: Furnish the turnover details corresponding to the financial year and ‘Submit’.
You will now be enabled for e-Invoicing.