Hi Milan,

No, you wouldn't be able to upload your EWS certificate now if you have paid the registration fees already. If you still wish to fill their registration form as an EWS candidate, what you can do, you can just make a new email id and then register with the help of a new email id and then upload your required document but the disadvantage here is that you have to pay the registration fees once again. So, just give it a thought.

Hope this helps.