What an eBay sale writes into QuickBooks
An invoice and a quantity, built line by line out of the order.
Each eBay order becomes one invoice. Products come across a line each, carrying the number sold and the price paid, tied to whichever QuickBooks item shares that SKU. Whatever else the buyer was charged sits under a heading of its own rather than folded into the goods: tax, shipping, tips, service charges, duties, any additional fees. None of them shows up unless the order genuinely carried it, so a plain sale of one item ends up a short invoice rather than a form with blanks in it.
Tax is the part to agree on early. Everywhere but Canada we flag all the lines non-taxable, which keeps QuickBooks from running its own calculation and stacking a second tax figure on top of the one eBay already collected. Canadian files work differently: there we apply whichever tax code you configured. Give your bookkeeper that detail in week one, because it costs a conversation now and a reconciliation later.
The money side is what we leave alone. Payouts, card fees and settlements are not ours to write, so the deposit that turns up in your bank, and whatever eBay took out of it on the way, stay with whoever reconciles your accounts. That boundary is drawn deliberately. We record the sale; something else records the settlement, and the two jobs do not have to belong to the same tool.