Please go to the Find icon (magnifying glass) at the top right corner in your return. Enter union and click on Union or Professional Dues that is highlighted then Go. When on this screen verify to see if you can remove that amount then click Continue to save your change. If there was no number there go to the left side menu and click on Income then T-Slips then T4. Verify the amount in box 44-Union Dues and edit it if necessary then click Save and Continue at the bottom of the screen to save your changes.