Hi @imran786,
I appreciate you for taking the time to post here in the Community. I can provide some clarification about adding a user in QuickBooks Desktop.
There are specific roles that will require the user's email address to create and link an Intuit account. These include Accountant, External Accountant, Finance, Full Access, Payroll Manager, Payroll Processor, and View Only roles.
Currently, the option or keystroke to disable the field is unavailable. The only way to successfully add the user is to include the email address.
I appreciate your input on this feature. As we assess this, I suggest you visit our New Features section (Help > New Features) within QuickBooks to stay updated with all the changes that are being made.
For more information, as well as how to manage your users and their roles in QuickBooks, I recommend the following article: Create and manage roles in QuickBooks Desktop.
Drop me a comment below if you have any other questions. I'll be more than happy to help. Wishing you a good one.