Perform the following steps to be allowed to take the official knowledge exams:
Complete all fields (including personal details) on the "Configure Your Study Program" page https://driving-tests.org/settings/ before you start the study program. Check for errors. This information must be sent to your testing center, so any mistakes here may disqualify you from taking the official knowledge exams later.
Complete the study program. You'll need to reach a Passing Probability of at least 80% before you can proceed.
Once you've reached a Passing Probability of at least 80%, we'll submit your training record to the TPR. Then you can take your knowledge exams to the DMV or testing location. Learn more here: https://driving-tests.org/driving-tests-training-provider-registry-tpr/