How to reproduce this fold effect in Illustrator?

Question

I love the LATAM Airlines logo and I'd like to learn how to make that "fold" we can see on the edges I marked with those green circles, connecting one line to another:

That could be something "easy" for those who are "nasa-level" on Illustrator, and because of that, you may tell me a good way (maybe the "right" way) to do it. I mostly created type-based logos, but I'm trying to develop myself in creating symbol-based logos. I'm not so good with Illustrator, but that's why I'm here again asking your help so I can improve my skills learning with who are already good at it.

Just a note: once upon a time someone here on Graphic Design stackexchange who highly criticized me for making a question about something I had no idea how to do it, so I'd just ask a favor: if you are not willing to help, don't reply. We're here to help each other and, also, to learn. I've been using StackExchange during my whole professional life, and unfortunately sometimes there are people with no education, you know that.

I appreciate!

Answer 1

Draw overlapping shapes with the pen. As well you can start from rotated rectangles and make only edits.

Hidden parts can be whatever, but visible corners probably need some tinkering Here's a zoomed detail:

You must be familiar with the anchor editing tools except in case you get it right at the first attempt. Having smart quides and snap to points ON helps. Be sure other snaps and pixel alignment are OFF.

Not asked: I would draw the folding a little differently. The white shape should have vertical right edge, if it's intended to be a folded planar stripe. Should it be planar? Artist's opinion decides. Here it is without a fill.

This is from Inkscape. There node editing somehow seems easier than in Illustrator (=an opinion again). One tool fits to all node edits, there's no need to switch like in Illustrator.

ADD due the comment

Rounding one corner: A highly skilled pen user can draw perfect curves straight in the fly, no edits are needed. The rest of us must do them more or less.

In inkscape rectangles, ellipses and other preset shapes must be converted to paths for node editing (Path > Object to Path)

Then add 2 new nodes around the corner (=double click with node tool), delete the original corner node (=Del), drag the handles. If a handle happens to be in a node, it can be dragged out if you hold Shift at the same time.

More tutorials: You must do web searches by yourself and see Inkscape's own website. On-demand tutorials are downvote magnets in this site, because many of us expect higher level content than repeated user guides.