Complete Schedule M to report increasing or decreasing modifications to your federal adjusted gross income.

If you haven't finished up your WV return, as you go through the interview, you will see a screen, Any West Virginia Adjustments to Your Federal Income.  Mark any of the boxes that apply.

If you have completed the interview, go back into the WV return.  On the screen, You've Finished Your West Virginia Return, click Update in the Adjustments section.  The "Adjustments" screen will appear.