The main reason for the discrepancy in income was a result of using actual units/services billed (from the billing software) and not what is recorded in the financials because, usually what is recorded every month in the financials is based on estimates and later adjusted based on actual billing and payments for services received. With this approach we were comfortable that, if necessary, we could trace the income to the actual service rather than an estimate. An unintended consequence was that income received in a year for a service in a prior year was not accounted for. While, immaterial, this resulted in discrepancies.
We are committed that in the future, we would take additional steps to review the information by other employees who are not involved in the process in order to get a different perspective, and seek outside help, like a CPA, if necessary.