I know the importance of passing the ProAdvisor certification exam, BlinkBookkeeping. Rest assured that I've got the details you need about it. 

When you take the whole exam, you'll only have three attempts to pass it. You might have locked out for 60 days, that's why you're unable to take it again until 5/5/2020. 

After the lockout period, re-taking the one failed section depends on the exam you're taking. You'll have an available number of attempts. Just go to the Available Trainings section to view them. If you're re-taking the QuickBooks Online 2018 exam, you're required to re-answer all of the questions in the section you failed. For more details, see the What happens if I fail to pass a section of the exam? How many attempts do I get? section through this article: Frequently Asked Questions About ProAdvisor Certification. 

As always, I'd suggest visiting this website: ProAdvisor Certification Information. It provides you with links about maintaining your certification, managing your CPE credits, and resolving certification issues. 

I'm just a comment away if there's anything else you need. Have a great rest of your day, BlinkBookkeeping.