Order letter received

I have received this letter on my profile what is mean
Plz explain
Din 12856489559 is genreated in respect of computation sheet of order u/s 143(3) r. W. S 147 dated 6/12/2019 passed in tds/ ast application of Income tax department in case of ankit narayan dixit PAN............ For the a y 2012-13. This din may be treated as common DIN for the relevant order and all its annexure



After this from income tax office i get one call who is saying plz come and take your order