Here in India the islamic scholar have told us not to celebrate eid or wear any new dress this year because of coronavirus pandemic and my question is am i sinful if we go against their will and wear new clothes on eid??

No problem in wearing new clothes for Eid as we are instructed to celebrate eid. However, you must follow the law if it prevents you from praying eid or gathering in groups.*

Please visit here for detailed fatwa information directly from highly respected scholar