If you do not understand financial statements and how they fit together, talk to your accountant. Your chart of accounts is a list of the accounts in your accounting system. Each account has a place on either the balance sheet or the income statement. Total assets equal total liabilities plus equity. The net profit is how the income statement ties back to the balance sheet.
Net income appears on the balance sheet in the equity section.
Using numbers from the income statement and the balance sheet, you can determine the health of your company. The margin is what is left over. This is not a lot of money when you are thinking of hiring someone to help with the work or if you are going to reduce your billable time so that you can write a book. When entrepreneurs get started, there is a tendency to pay employees too much and charge customers too little. To help yourself charge the amount you need to cover your expenses and make a profit, make a chart.