To add channels to your account it is necessary to access the menu in Data Sources (1) -> Channel (2) and click on the Add button (3). In the screen that appears, just set the name of the channel, it can be the same as the data source that you must create after creating the Channel.
Note: It is necessary to add a channel to your account before creating a data source, since they have the function of collecting the information to send it to the RSS sources..
When creating an RSS feed you can obtain the information through a channel. Then add a name and click Add. As shown in the image below.