Hello,

You can upload the income certificate for now, or if you have applied for your EWS Certificate, then you can also upload the slip stating that you have applied for the same.

Your admission will be considered under EWS category, however, it will only be confirmed upon verification of your documents, make sure you have all your documents on the date of verification of documents. If not, you can use your confirmation slip for EWS and an application, that would buy you enough time to submit your EWS Certificate.

I hope this helps.