Home › Merge Guides › Facebook Marketplace + Wayfair › Sales Tax Reporting

Merge Facebook Marketplace and Wayfair Sales Data for Sales Tax Reporting

Sales tax reporting needs order totals broken out consistently by date and location, which rarely matches between two platforms' raw exports.

Why Facebook Marketplace and Wayfair exports don't line up

Facebook Marketplace: an order date recorded through Meta's commerce backend; item total and a Meta selling fee where checkout is enabled; an order ID formatted differently depending on whether Shop Pay or Meta Pay processed the transaction. Also, many sellers use Marketplace only for listings with no built-in checkout, so exports may only exist via a connected store's own platform.
Wayfair: a purchase order date distinct from the ship date required by Wayfair's supplier terms; wholesale cost, freight allowance, and Wayfair's referral fee as separate columns; a Purchase Order (PO) number rather than a typical order ID. Also, built for suppliers rather than direct-to-consumer sellers, so column names lean toward logistics (PO, ship window) rather than retail checkout fields.

For sales tax reporting, that mismatch is exactly what causes hours of manual cleanup every period.

Open CSV Experts and set your target columns once (Date, Channel, Order ID, Total).
Drop in your Facebook Marketplace export and map its columns once.
Drop in your Wayfair export and map it the same way — both merge into one sheet, normalized.
Export as CSV or Excel. Same-layout files merge automatically next time.

No. Everything runs in your browser using JavaScript — your files are never sent to a server.

Yes. Add as many source files as you want; each distinct file layout is mapped once and remembered.