CSV is often the cleanest handoff into a sales tax workflow because the structure is visible, exportable, and easier to validate than screenshots or ad hoc summaries.
When sales data arrives in rows and columns instead of a flattened PDF or manually edited summary, it is easier to test assumptions, map fields, and identify missing state data before filing work begins.
CSV works especially well when it comes directly from Shopify, marketplaces, Stripe, WooCommerce, BigCommerce, or a reporting layer that preserves line-item and tax detail.
If the CSV strips out marketplace context, refund treatment, jurisdiction fields, or the filing period definition, more cleanup is usually required before a return workflow is reliable.
The long-term value is not just reading the CSV once. It is connecting that export into a repeatable workflow for nexus, registrations, approvals, and filings.