I have a Access DB "STG" I have fields "KKS Number" and "Type"

I have a userform that shows KKS Number and Type, I would like the user to be able to change the "Type" textbox on my form "STG2" when they press a push button

The KKS Number is read ONLY, I cannot seem to work out how I look for the KKS number in my table and then change the type with what has been entered by the user.

Is this possible if so any tips would be greatly appreciated.

Thanks Izzy