How you make the song end it’s 100% depending on the song, but look for Ollie’s tutorial on how normalize your audio and remove the fadeout, that is an essential starting point.

In terms of the actual ending, I usually find a solid downbeat at some interval of 4 (assuming 4/4 time) to end on. So imagine the outro is about 10 measures long when it fades to nothing. Firstly, using the steps to more normalize the audio.

After that, like I said assuming 4/4 times, you want to count out groups of 4 from the outro area. In this case, you go 8 measures out (ie, 4 then 4) and mentally mark this as your end location. From there, I usually move my cursor to the next beat (so the first upbeat, usually a snare hit in a general rock beat). This should be where the audio cuts off. Remove everything from this point to the end. What you should be left with is a good downbeat and then the next upbeat. Apply a fade-out yourself from the downbeat to the end. This will make that last downbeat strong, and then it’ll fade out quickly over the course of the next beat.

I prefer this because just cutting straight out on a note sounds awkward. However, the longer the “new fade-out” is, the more problems you will having charting. You should technically chart everything heard, so if you extend the fade-out you may have to chart in it.

If you want to make your ending more professional, get sound clips of a bass drum and then both a hi-hat and a crash [likely several]. Right on the last note you intend to chart (that downbeat) splice in the the bass drum and then whatever hi/crash sounds best.This just gives the end a more precise and explosive “end”.