This document provides an overview of tricky transactions in QuickBooks Online and how to handle them. It discusses recording retainers and deposits through creating new accounts and items linked to those accounts. It also covers writing off bad debt, allocating overhead through journal entries, using zero pound transactions, and recording loan payments as recurring transactions. Other topics include entering daily sales summaries, troubleshooting bank reconciliations, using the audit log, and creating an opening balance journal entry for a "fresh start" in QuickBooks Online. The document provides step-by-step instructions for completing many of these tricky transactions.