Up page will open to make your changes. This page provides directions on how to update your email, mailing address and other contact information.Learn how to Change phone number in the Modern Employment Application without leaving your browser. Get the job done in minutes without installing any app. Learn how to Change phone number in the Job Application without leaving your browser. Trying to fill out my phone number on a job form. No, I can't type it. If you are not sure if you need to report a change, call DTA to ask at 1-877-382-2363. If your mobile number changes, you are responsible for informing the Customer of that change. Login to ess.boston.