There is a modifier repeating section on the Shaped sheet. If you add a mod, you will be given a list of attributes that mod will effect. Because the Shaped sheet handles skills as a repeating attribute, it will list them by number position on the list, rather than by name. Count down your list (start counting with 0, because reasons), and add your mod to the appropriately numbered skill. It might thake a second to update, but you should see the reported skill total increase.