Step 1 Press Insert + Ctrl + B  to get a list of buttons on the page. Search for the Label Button then press Enter to get the focus on the Label Button. When focused on the label button JAWS will read out the number of labels associated with the page

Step 2 Press Enter again to get a dialog to add a label. JAWS will say Add Label Type in text. Then type in the label you want and press Shift + Enter to  Add the label. 

Step 3 Once you have add the label press Tab to access a set of labels for the page.

Step 4 Press Escape to exit the Add Label dialog box.