Welcome to the Community, @TF19.
If you are referring to the email address and the notes field, yes, you can enter more than 11 characters. You can add up to 30 characters for the email address and 4095 for the notes.
I'm adding these links as your reference about character limitations:
Let me know if you have questions about feature preference in QuickBooks Online. I'm always here to help. Have a great day.
