Income Tax Problem

For One of the employee we forget to maintain the PAN number and ran the live payroll,Due to some resons we paid salarys manually with income tax is zero (ie out of sap). Now we ran the all 4 months live payroll in sap system it shows calculation the income tax 4,000 for july month and remaining 3 months we maintained volantary income tax zero

Now we want to make that 1 month Income Tax 4,000 become Zero(because as we paid that manually as zero) so what to do please guide me?