The requirement for uploading documents for a Non-Creamy Layer (NCL) certificate can vary slightly depending on the specific state or issuing authority.

Check the official website of the department that issues NCL certificates in your state. They might have a dedicated section outlining the application process and required documents. Look for keywords like "Non Creamy Layer Certificate," "Application Process," or "Required Documents."

If the information isn't clear on the website, reach out to the department or office responsible for issuing NCL certificates in your area. You can find their contact details (phone number and email address) on the government website of your state

• You might be required to submit attested copies of your school leaving certificate and other documents like caste certificate, income proof, etc.  Attested copies are photocopies verified and signed by a gazetted officer or authorized person.
  
  

• Uploading scanned copies of these attested documents online during the application process might be sufficient.
  
  
  You might need to present the original documents along with the attested copies during physical verification at a designated office.
  
  I hope it helps!