You cannot type directly on the forms. The information that you provided to the Questionnaire(s) will transfer over and populate your forms. If you need to correct a response, return to your questionnaire and fix the information there. This will, in turn, correct your form.
If the information you are attempting to correct is greyed out, your Human Resources Office will need to un-lock your questionnaire by returning the previously submitted forms that contain that response. Contact your Human Resources office for assistance.