E-Campaign Compliance Portal - Revised return post due date

Hi,

I received an SMS from CMCPCI regarding the mismatch in the income filled in the ITR for AY20-21, however when I viewed the compliance portal nothing was visible, however now I can see the difference in the SB Interest doesnt match with the filled ITR. I submitted response on Compliance portal as Information is correct. However since the due date has passed, what are the options left to file the revised ITR correcting the income details.

Any help would be highly appreciated.