If you have an appraisal you're working on from UWM and you need the due date changed, please contact UWM directly as they are the ones who control this field.
Please be aware that the Anow support team cannot make these changes, only UWM can.
UWM's contact information is:
Phone # 833-896-2300
Appraisers will get a confirmation email of the due date being changed.