The document provides information on common errors retirement plan sponsors make and how to correct them. It discusses errors related to compensation definitions, eligibility requirements, distributions, loans, plan documents, and other areas. It explains that plan audits test sample transactions but don't find all errors. The document also gives guidance on how to correct errors by making corrections through self-correction or voluntary correction programs. It provides examples of correcting errors related to compensation, eligibility, missed enrollment forms, and excess contributions.