I don't think you understood my reply. If you recorded 1 side of the cassette in a single go, then as far as Audacity is concerned, that's a single track: it has no way of understanding that it's 10 separate songs. You have three choices:
1: Record each track individually, saving as you go.
2: Chop the track up into 10 separate files afterwards
3: Edit the track by deleting some of the silence in between the songs.
If you are intending to pu it on a CD or MP3 player, then options one and two are the best options (otherwise you have no means of selecting a specific song, except by skipping through the single track you've recorded, looking for the ends!
Option 1 needs no further explanation.
Option 2:
First ensure that you saved a copy.
Zoom in so that you can see the gaps between songs.
Drag the cursor from the first gap to the end, and hit delete - this eill leabe you with only the first song
Export the result as track 1
Load the original
Drag the Cursor from the start of song 1 to the start of song 2, delete it.
Drag the cursor from the end of song 2 to the end of the track, delete it
Export the result as track 2.
Repeat until done.
Option 3.
Set the zoom level so that you can see the gaps between the songs
Drag from the end of song 1 towards the start of song 2 until you have only the required gap (in seconds) remaining
Delete the highlighted section.
Go to the end of song 2, and repeat, deleting any excess gap beteen it and song 3
Repeat for each gap
This will give you the required gaps, and you can now save and/or export the file.
Just remember that using this method, you don't have 10 tracks - you have one track with 9 quiet bits in it!
Repeat