Before you go about adding "EP" to your album title (and artwork), be sure to double-check that your release qualifies as such. When the various platforms receive content, they label it as a single, EP, or an album based on how many tracks are on the project, and the total run time.
Releases that meet the requirements below will automatically be designated as a single.
The release is one to three (1-3) tracks.
The entire release is 30 minutes or less and all individual tracks are less than 10 minutes.
Releases that meet the requirements below will be identified as an EP.
The release has a total of one to three (1-3) tracks, one or more of the tracks is/are 10 minutes or longer and the entire release is less than 30 minutes.
The release has a total of four to six (4-6) tracks and the entire release is less than 30 minutes.
Releases with seven (7) tracks or more will automatically be logged as an Album in both Apple and Spotify.