Please read this Tutorial http://manual.audacityteam.org/o/man/splitting_a_recording_into_separate_tracks.html.
Note that Audacity doesn’t export artwork in audio files. This also means that if an imported audio file has artwork, Audacity will remove the artwork from it when exporting that file. You can add artwork to a file in Windows Media Player or iTunes, consult the Help files for either program to find out how to do that.
Also please note if you ask this same question again you will be banned from the Forum without further warning. If you are not sure what I am talking about please click here https://forum.audacityteam.org/t/labelling-tracks/27208/1 .
Gale