The next step in the process is to define the Recipient Listing that you wish to send this Mail Merge to. Because you have already selected Carer as your Profile Type, you will be presented with a listing of all Active Carers.
You can then select the particular Carers you wish to send the Mail Merge to by checking the checkbox beside their name. You can also use the wide range of search options on this screen to refine your search, as shown below: