From eBay:Refunds to a BuyerIf the buyer requires a refund—cancellation,
full refund, less than full refund, or partial refund, eBay will refund
the sales tax to the buyer in these cases since we collected the sales
tax on the original transaction.Th...
Unfortunately, eBay doesn’t take responsibility for collecting or
remitting sales taxes from sales on its site — this job falls on
sellers' shoulders. However, eBay does offer a great tool to help manage
sellers' sales tax obligations: Using a Tax Ta...