Audit and Tax Coordination Services Periodic coordination with external auditors Expand Audit preparation and audit coordination can be extremely time-consuming activities for controllers, Opus resources are available to support your external auditors in coordinating the assembly of requisite data and documentation, Preparation of internal systems and documentation to facilitate audit processes and minimize external audit costs, Periodic and year-end tax coordination and filing Expand The Opus team can coordinate between your firm's systems and external tax advisors for quarterly and year-end tax preparation, Periodic tax filings and assurance that tax payments are submitted on a timely basis, For upstream energy firms, Opus will coordinate the entry of year-end reserves adjustments in conjunction with reserves auditors and tax advisors.