Formula tool assistance

[Navya08]

Can someone help me to find the discrepancy while comparing two files?

payment file and end dates file- i want to identify cases that are paid between report date and end date from end date file to the payment file where i just have month and year-?

(Group by emp id as well because payment file can have multiple year and date data )

[aatalai]

@Navya08 does this help