The steps to request the CAS are as follows:
Step 1.”Click here” to request CAS. 
Step 2. Choose the statement type “Detailed”
Step 3. Select “specific period”
Step 4. Select from date “01/04/1990” and till date as the current date
Step 5. In folio listing, choose “with zero balance folios”
Step 6. put your email as mentioned in the investments.
Step 7. Choose any password, this will be used to access the password-protected statement.
Step 8. Submit the same.
You will get an email with your Consolidated Account Statement attached.
Upload the same here with the password.