Case Study: Interstate Batteries achieves streamlined, automated tax provision and compliance with CSC Corptax

Meeting the Evolving Tax Landscape with Agile Tax Technology

Interstate Batteries, a 50-state filer, struggled with disconnected provision and compliance systems that forced heavy Excel reliance, manual reconciliations, and frequent workpaper breakages. When their provision software couldn't handle new tax law changes they reverted to Excel, creating version-control and analytics gaps and even paper-filing 58 returns. To modernize and align their tax lifecycle, Interstate Batteries selected CSC Corptax’s corptax® Tax Transformer single-system for provision and compliance.

Using CSC Corptax, Interstate Batteries centralized data end-to-end, automated routine calculations, and integrated Alteryx workflows via Corptax Office to push apportionment and depreciation adjustments into the system. The change enabled real-time Tableau dashboards, automated 60% of federal M1s with instant RTP computation, cut paper-filed returns from 58 to 13, and reduced estimated-payment workbooks from 3/47 tabs to 1/11 tabs—dramatically shrinking manual workpapers, improving data reliability, and speeding onboarding with documented procedures.

Interstate Batteries