wrong PAN no. entered

Priyal Dangi (4 Points)

06 June 2018  
For AY 17-18 while submitting the ITR wrong PAN no. was entered unknowingly.
However the tax was claimed as self assessment tax and the acknowledgement was also generated .

Later it came to knowledge that PAN no. was wrongly entered and a demand notice was issued.
what will be the remedy available for the same?