A partner is a client or a provider or both of them. The only difficulty when creating a partner is to choose the imputation accounts. In a first approach, we would recommend to create an account for this partner (two if he is both a client and a provider). Then you use the same account for the four items required. Once the first client/provider created think in the copy function in the Tools menu of the Clients window. It will generate a deep copy : a copy of the imputation accounts too.