I signed up for a Twitter account and linked it. I am now up to 85%. My two certifications I have are not listed in the drop down box (Certified Public Bookkeeper and QBO Pro Advisor) which I find strange. I don't see how I will be able to raise it at this point so hopefully this will help. Thank you so much.
You can add a certification that can be validated by Upwork. A complete list of those certifications is available here. If your certification isn't among them, you can still use your profile's portfolio area or overview to highlight that achievement, provided there is no contact information in it.
Certifications aren't required to have a 100% completed profile. Completing other sections will also allow freelancers to achieve a 100% complete profiles as you can see in this help article.