Copy your profile onto a second layer. Draw the tabs that you need on that layer.
Then, profile the part with the original layer, down to a safe level that will keep the part safely attached.
Then, create a second toolpath with the tabbed profile that you created. Cut this level all the way to the bottom of the part.
I prefer to rough the profile most of the way down with a cutter that is quite a bit larger than the finish tool. This provides a wide enough kerf that the finishing tool will not be nibbling the edge of the waste and wanting to pull it up and cause havoc. Also, you need a little bit of room to permit the tool to get in and around the tabs without descending/ascending immediately next to the finished part.
It's not dead simple, but then you are the machinist, and you have to do something to keep your elevated status
First you get good, then you get fast. Then grouchiness sets in.
(Note: The opinions expressed in this post are my own and are not necessarily those of CNCzone and its management)