I want to download the government generated invoice from the portal. What is the process?

Condition 1: If generated within 48 hours, then you will download from both BUSY and the E Invoice portal.
If it was generated from the e invoice portal, then follow the below steps:
Step 1: Visit the E Invoice Portal, Go to the e invoice portal's website, which is typically provided by your country's tax authority. In your case, the website is https: einvoice1.gst.gov.in .
Step 2: Log in, Click on the Login option on the portal's homepage. Log in to the e invoice portal using your registered credentials.
Step 3: Generate an e invoice in bulk. After logging in, look for the option to print an e invoice. Click on this option.
By following these steps, you can download an e invoice generated from the e invoice portal.
or
Condition 2: If it's been over 48 hours, follow these steps:
Step 1: Log in to the GST Portal at gst.gov.in.
Step 2: Go to the return dashboard.
Step 3: Select the relevant return period.
Step 4: Click the search button.
Step 5: Choose GSTR 1 to view your return details.
Step 6: On the GSTR 1 screen, click on E Invoice to access the history.
Step 7: You will find the option to download e invoice details in Excel format.