First of all download the ews form here EWS Certificate Form

• Fill in the application form
• Attach required documents and passport size photo
• go to the tehsildar office or local block development office and submit your form
• they will verify your form and if details are found correct your ews certificate would be made
• Documents required for ews certificate :
• income,caste, property certificate
• Aadhar card
• voter id card
• passport size photo
•