One option for you to end your composition or song is with a cadenza.
It can either be written out for a performer to play perfectly, or you can just give chord changes of harmonies held by a fermata and allow the person to improvise.
Either way, this gives opportunity for not only your composition to have an exciting climatic ending, but to also give freedom to the performers to creatively craft a solo.
Thank you so much for taking the time to read! Feel free to comment, share, and subscribe for more daily tips below! Till next time.