Payroll IT calculation wrong

Hi Experts,

For last couple of days I have been noticing that IT is getting calculated wrongly in my configuration. Not for all employees but for some. An employees net taxable income is 757,940.00 so total tax should be Rs 51,588.00 but it is coming like Rs 151,588.00. Somehow system managed to add 100000 Rs to the total.

Can anyone tell me as to why it is happening?

Thanks.