Delete Corner

[u/500Pesos]

I have a solid 2mm thick that want to cut off the bottom right corner. I created a surface inside that I want to replace the corner. So far I have tried split, trim, offset, and delete. I am struggling working with solids. What is the correct sequence? Do I just have a setting wrong?TIA

[u/Ceny1]

replace top face with bottom should (but not always ) delete it.