TradeGecko will send all Stock Adjustments as a daily batch/Stock Journal at the time that is set in Sync Timing. If you make a positive stock adjustment, your Xero/QBO account should reflect a debit for Stock on Hand account and credit for the selected Inventory Adjustment ledger account. If you make a negative stock adjustment, your Xero account should reflect credit for Stock on Hand account and debit for the selected Inventory Adjustment ledger account.