The audit process is designed to verify the accuracy of a company’s return and identify areas where the company may be non-compliant. sales and use tax audit procedures typically include a review of the company’s inventory, purchase records, cost of goods sold, and other financial records. The auditor will then compare these numbers to the information that was reported on the return. Audit firms usually have the same high level of expertise as their larger counterparts but they also have more flexibility and personalized service for those who need it.