Good morning @jackiann!
Thank you for your post! Depending on how the district set up phone number formatting, it may be set so the users have to use a specific format for a phone number. In this type of instance, usually, the error is that the entered number is outside of the prescribed format set up by the district. If you are a parent filling out the form for your child, you will want to alert your school district so that they can correct any errors in the field so that the form can be successfully submitted.
JoshK PowerSchool Community Admin