It’s the same email address from the oath invite email. Other than the signature and date, in the top right corner, you need to put in your application number and your UCI number. Don’t worry, after the oath, an official will go into a private room with you and show exactly what and where you fill things out on the form. You can also ask any questions you may have during that time. You can also ask questions when an official checks you in, it’s in another one on one private room. The whole thing is very well run and they make sure things are very clear.
Thank you for information. I appreciate it. !!