Spreadsheets can help you organize and manage all sorts of information. Budgets, client lists, employee data and even vacation plans. The spreadsheet is the Swiss Army knife of small business software. But using a spreadsheet to manage your expense reporting process is like using that little plastic toothpick to flip pancakes. You can do it, but do you really want to? Especially now that there are slick online services that automate every aspect of expense management. Here are the top five reasons to say goodbye to spreadsheet-based expense reporting and take the whole process online.