Hello, I'm getting a head start on Lab 3b since I will be out of country in December. I'm stuck on Step No. 38 since I cannot locate the blue Done button on the lower right (see attached screenshot of my current work). Can you help witht this? Thank you in advance.

Yes, Salesforce changed that a couple of weeks ago and we released a new updated version of the instructions. Please let me know who your instructor is so I can make sure they give your class the new version.
I’m the meantime, you can ignore that step and continue. The form is now appearing on the right hand side instead of as a pop up window. Other than that, everything is the same.