As many as needed! You have unlimited re-takes until your course access expires (one year after your registration date).certificationcertification examcompletecompletionExamLeanpacingquestionsretakessix sigmaTrainingRelated Posts I’m registering my team. What is the complete setup process for registering teams?Here's the simple setup process for registering your team. You send us a list of… How do I access my free resources with my purchase of Green Belt Training & Certification & Black Belt Training & Certification?With the purchase of your Green Belt or Black Belt Training & Certification, you receive… My course has recently expired. Do you provide extensions?Yes, we do provide complimentary course extensions. Please contact us for more information.