All billing for the MRC clients will be done by creating the flat file from your MRC calculator on the DODD site. Then you will import that flat file into Brittco. After the import, you will find this billing data on the Reconciliation screen and included in all billing reports. You can then create an invoice in Brittco as you would always typically do, which will include the MRC billing in the process.
If you would like to keep track of times on the HPC screen for your MRC clients, the first step is to create a Cost Center for the HPC service and click 'Exclude from DODD' on that Cost Center. Then you add HPC activities for the MRC clients as you would for all other clients. But since they will be excluded, no billing setup data will be created. Only billing data on the reconciliation screen that has been imported.
This means the MRC billing records imported into Brittco won't have a direct link to anything created on the HPC screen. But this will allow for those clients to be on the same record with other non-MRC clients to get the correct ratios.