I have TDS return for Q1 of 2018-19. I have filed both 24Q and 26Q and both had 3 entries each. By mistake in both the forms i enterd same challan number for 1 entry i.e. "15389". When i cross checked i found that the challan with "15389" was for 26Q only. But AO has considered it for 24Q and notice for default came for 26Q. I tried to correct return by importing consolidated file in RPU but there is no edit option for challan number as field is grey in colour.
How can i rectify this error?