I had to login with my Intuit account to activate the product. Fine. But the desktop app displays email address incorrectly. File menu > it shows "signed in as xxxx", where xxxx is my email address with underscore characters removed.
Edit to add: just in case it wasn't clear. My email address contains an underscore character. Displaying my email without an underscore character is incorrect. This is a bug report. I don't need any help. Just fix it.