Final answer:
Accounting software is designed to support the common tasks required to close a client's monthly books, including managing money and tracking cash flow, thereby avoiding overdrafts and insufficient funds fees.
Step-by-step explanation:
The tool designed to support the most common workflows and tasks to close a client's monthly books is typically an accounting software. These programs are designed to streamline the process of managing money, tracking cash flow, and ensuring that all transactions are accounted for. This systematic approach helps to avoid errors such as overdrafts and the associated fees with having insufficient funds. Accounting software typically features a variety of functions such as transaction recording, bank account reconciliation, and financial report generation which make the task of closing monthly books much easier and more efficient. By keeping your financial records updated regularly using these tools, you not only save time but also gain a clearer insight into the financial health of the client's business.