You father can take benefit u/s 80C, if you want to take benefit than show the amount reimbursement to your father via cash/ cheque than u take benifit.
If you are maintaining books of account that through entry in books of accounts of both if you are not maintaining books than than there is no need to show any where, just explain that u reimburse the said amount to father. for safer side u can take sign receipt from father for reimbursement of same.