Sec 154 rectification

i received 143 (1)  completion order. But there was mismatch in TAN  no and could not get tax credit. I followed the process to rectify online u/s 154. But while feeling excel utility ITR2 , pull down window is not showing sec 154. I tried with 139(5) and even 139(9) , but while uploading X M L it says mismatch in sec of notice and filing sec.

how to rectify sec 154 for A Y 2019-20 under ITR2