To create a cash flow forecast for exit planning, you need to gather relevant data and information, such as income statements, balance sheets, cash flow statements, budgets, market and industry trends, drivers and benchmarks. Additionally, consulting with your portfolio company's management and advisors is essential. You should then build a cash flow model and assumptions using a spreadsheet or software tool that can calculate the future cash flows of your portfolio company. It is important to make realistic and reasonable assumptions about the revenue, expenses, capital expenditures, working capital, and other cash flow drivers. Additionally, consider different scenarios such as best case, base case, and worst case. Finally, analyze and validate your cash flow forecast by reviewing and testing it for accuracy, consistency and sensitivity. Compare your forecast with historical and current performance as well as with the market and industry expectations. Identify any risks or errors in your forecast and mitigate them accordingly.