Hi,

You can try this site. Download the program, pay $9.99 (click on RESET KEY bottom left of page) for how to pay for key to make program work.

http://www.wic.support/?page_id=134

They also offer a free one time only Trial Key (it only reduces your counter down to 90%) to get you going more quickly

http://www.wic.support/?p=198

if you look closely at the video in the middle of the page they type the word, trial, in the box for the key

This one program is only one of many, just for your info, you may wish to find one that you prefer by googling reset waste counter Epson L120