If you don't pass one or more of the GED tests you are allowed to take them again. Each state and jurisdiction may have its own rules governing when and how you can retake the tests. For example, states/jurisdictions may have requirements regarding time between retakes. Some states may also require you to attend a GED preparation course before you are allowed to take the test again. Additionally, most states will require additional fees for you to retake the GED exam. You should check with your local state/jurisdiction GED administrator to verify the specific process for retaking a GED in your region.