REPLY OF SMS BY DEPARTMENT

I GOT A SMS FROM DEPARTMENT FOR EXCESS ITC CLAIM IN GSTR 3B AS GSTR 2A SHOWN LESS AMOUNT. I HAVE CLAIM EXCESS ITC IN JULY DUE TO SOME INVOICE OF F.Y.2018-19 HAS BEEN LEFT IN ACCOUNTING AND SAME INPUT IS CLAIM IN MONTH OF JULY. My question is how can reply to department for this SMS. I have not received any other notice on mail air my portal.