How do I enter letters into number fields?

[WorkingHard1234]

I am filling out a job application on adobe reader, and its asking for a phone number but my answer is N/A.

So how do i put "N/A" in a box that is asking for a phone number?

Thank you for your help. This will be a live saver. Thank you.

[Bernd Alheit · Accepted solution]

Not possible. Let the field empty or enter a phone number.