If you don’t compensate for the kerf properly, by offsetting the lines of all closed shapes by half the kerf width, your tabs will not be cut to the proper (as-designed) dimensions.
Thankfully, I don’t have to explain it all again, as I did a pretty good job last year.
If you want your tabs to be the exact same lenth as the thickness of the material, and you’ve designed them to that length, you’re going to want to cut them with the kerf-compensating technique that will cut your tabs to the correct, as-designed, length.
Thankfully, the kerf-compensating technique that you will want to use in this instance is the exact same as the technique you’ll want to use for all other instances of cutting out closed shapes, and that is to offset the lines by half the kerf width.