How can I execute a "partially" angled extrusion step?

[Anonymous]

I'm in the process of designing an enclosure and encoutered this issue. I'm not being able to figure out a way to remove the section in red. Thanks in advance and my apologies for the ignorance. How can I make this step so my construction will become somewhat hollow?

Current object:

Representation of the step I'm trying to do:

What I need as final result:

Overview of the project:

[lichtzeichenanlage · Accepted solution]

You might getaway with a simple extrude cut to object feature.

If your cut isn't parallel to the top surface, just insert a construction plan and use this as target.

[Anonymous]

Thank you so much for your time and effort. Im sorry for the late answer, really appreciate this lesson and the fact you made a tiny video! I’m a visual learner, so thanks a lot!