What i do if i had filled wrong challan 280 details

Dinesh kumar (ACCOUNTANT) (28 Points)

29 March 2017  

one of my client had taken challan 280 for self assement tax but he selected Minner head TAX FOR REGULAR ASSESSMENT(400) in place SELF ASSEMENT TAX(300). And same i had filled wrongly in ITR. what should i do now....plz comment