Home › Merge Guides › eBay + Bonanza › Quarterly Tax Estimates

Merge eBay and Bonanza Sales Data for Quarterly Tax Estimates

Quarterly estimated tax payments depend on knowing real revenue across every channel, not just the platform that's easiest to check.

Why eBay and Bonanza exports don't line up

eBay: Sale Date shown in the seller's local time; item subtotal, shipping, and final value fee as separate columns; an Order Number that can bundle multiple items bought together into one row. Also, the seller hub export format changed more than once, so column names can differ depending on when the report was generated.
Bonanza: a sale date shown in the seller's account timezone; item price and a Bonanza final value fee that varies by advertising tier chosen per listing; an order ID unique to the marketplace. Also, fee amounts differ per listing based on optional ad placement, so two otherwise-identical sales can show different fee columns.

For quarterly tax estimates, 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 eBay export and map its columns once.
Drop in your Bonanza 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.