Every Shopify store keeps its real commercial truth in the storefront: the products, the SKUs, the prices, the discounts, the tax rule per item and country. The books rarely know any of it. Revenue arrives as totals that do not map to products, VAT rests on assumptions rather than the store's own tax setup, and someone rebuilds the picture in a spreadsheet whenever margin per line is needed. The money side, the settlements and payouts, is a separate problem that belongs with your payment provider.
Nance keeps the storefront and the books in step. It reads the catalog, the pricing, the tax settings and the order records from Shopify, maps revenue to real products and the right tax treatment, and keeps several stores or currencies apart where you need them. The shop stays the source of what was sold and how it was priced; the administration finally reflects it without a manual rebuild.
