How do I enter my email address for the signature block of the 1040 or 1040-SR?

I can't find anywhere to enter my email address to be filled in on the 1040 under the "Sign Here" section.  When I go to Forms View and click in the email field, I'm unable to type anything!  When I click on the magnifying glass to go to the supporting form, it opens the 1040/1040-SR Worksheet to the corresponding email address field on that form, but again, I cannot type anything in that field, either.  There is no magnifying glass for this field, so it should be able to be edited to enter data!  How can I get around this problem to fill in my email?  Since I'm e-filing, I can't just fill it in by hand on the paper copy.