Hi Vinodh,
Make a list of employees who structure have been changed wrongly..
Go to PC00_M40_CEDT (this will give actual pay structure been paid & posted) and enter 7th month period for an employee
Open another session & go to PC00_M40_Calc_Simu and enter 7th month period of that employee..
You need to check each and every pay component & from 7th till 10th month...& look out for actual salary component...
Finally go to IT0008 overview record & copy the latest record and make appropriate changes from 7th, 8th, 9th & 10th month..
Finally make actual run & go for posting...It should sort your issue..
Regards,
Veeram