I have income and ews certificate which was made on October 2019. So can I use it in upsee 2020 counselling or I have to make new income and ews certificate for upsee counselling 2020 ?
The certificate which declares you to belong to the Economically Weaker Section (the EWS certificate) is valid for 1 year from the date it is issued. As you stated your certificate was issued in October 2019 (last year), it will not be valid this month onward. I suggest you get it renewed as the counselling is still going on.