Reimbursement reversals happen when Amazon takes back the cash payment for a previous reimbursement and gives you inventory instead.
You shouldn't map reimbursement reversals to any account because this transaction type always involves inventory. We'll create the proper QuickBooks Online document that'll reflect the quantity and price for this transaction.
This transaction may also show up as COMPENSATED_CLAWBACK or Reimbursement_Reversal on reports. They all refer to the same transaction type.