I'm currently on my free trial

Avast Cleanup
1

I would like to know how to cancel my subscription before-or on the day of my expiration.

2

Go to https://my.avast.com/en-us/#licenses , search for the product (that you want to cancel) and click on “Cancel Auto-renewal” button.

Example:

https://s19.postimg.org/6flkd9kgz/licensecancel.png

If it does not work, contact support: https://support.avast.com/en-us/contact