under Wages & Income any of the 1099 sections hitting update will take you to the new badly redesigned screen with all the 1099s and those big blocks, you scroll down to the block you want to delete and hit the trash can button (or hit edit if multiple sales you want to edit/delete) . But maybe what you're finding is the whole screen just goes grey after hitting the trash can - if so, you need scroll all the way back up when it turns grey because there is a yes/no dialog box right at the top...
