In Sheet Metal, unable to select a sketch to create a tab a second time and moving forward. However, it is possible to create a tab if selecting a feature(tab) rather than a sketch.
SolutionThe tab command only allows sketches on the first tab creation. After that it requires a face of the part because we need to guarantee the sketch is on a part face. So the only way to create a new tab is to pick a face and draw the profile within the command. The prompt on the second tab says to pick a face or a Reference Plane, but even a Reference Plane would not be selectable, just faces.