Basic Pay capturing against multiple WBS in the same period

Hi Experts,

Needed your Help.

We have a new requirement from client, In Indian Payroll where in for a group of employees (ESG 9) who are working on Projects, the cost of the employees WT Basic Pay and WT HRA need to captured against a WBS.

They are working on multiple projects so in one period they will have multiple WBS assignments.

Problems faced are –

1. No Cost allocation option in IT8 so cannot use IT 8.
2. Cannot use IT27 as there are multiple WT’s but they want to capture only Basis and HRA cost in WBS and not the rest of the WTs
3. When I configured new Basis WT in IT15, and gave 3 records in the same month with WBS, then for PF calculations are incorrect and only 1 record is captured for PF calculations
4. When I change Basic Pay WT PC 20 to “ B- RT storage with V0 split and cumulation” the PF calculations happen correctly but the WBS is not captured in Posting.

Please advise on how to meet the clients new requirement.

Please let me know if any additional information is required. Looking forward for your help.

Thanks & Regards,

Vishwas