How to auto relief this miter flange corner

Hello all,

I am new to using Solidworks and was working on a part that is like the "Miter Flange Problem" in the zip file. We made the piece and the bending on the corner marked in red in the "Figure A.PNG" was off because the material extruded and the corners ended up touching.

I was wondering if there was a tool or a method or an alternative way to make this part so that I could make a relief where the bend is. In the end, I manually cut out a relief after unfolding it and checked it again after refolding it with the relief cuts. I was just wondering if I could do it a better, easier way.

Thank you for your help.

SolidworksSheet Metal