Activate the insurance in the employee's data.
1 -First of all, you have to add the item in the closed salaries by means of the following utility: click here.
Do not touch the recalculation. It is not necessary and would skew the numbers.
Putting the correct insurance today would not make up for the months when the program does not find it.
2 - If it is an insurance defined in the insurance contracts (LAA, LAAC, IJM, LPP) you must then redo the missing insurance codes: click on LAA LAAC DII or LPP.
If it is another contribution (such as Amat, PCFam, etc...) step one is sufficient.
Once these operations have been carried out, the program will catch up in the current month.