Hello, my wife and I have also just started a business in UK, and had the same problem. We have actually produced an Excel spreadsheet to do this job for us, though it is of course geared to the UK tax system. Apart from allowing us to record all items of income and expenditure in a faster way than in a ledger book,with all the 'income over expenditure' totals of course calculated,(and in a much nicer presentation) it also calculates tax liability as you go in real time so you know on what day you start paying tax and how much. There's also a 'what if' section which allows you to experiment with different levels of taxable and non-taxable expenditure based on the figures to date. The spreadsheet allows 12 pages of income and 12 of expenditure but is of course expandable. The column headings for different items are of course able to be customised as well. The tax calculations are based on a number of values entered at the top e.g. thresholds and percentages, so if the US system is similar in principle, maybe it can be customised to suit. You and other members of this forum are most welcome to have a copy to see if it is any good for you, free of charge. You will need Microsoft Excel to run it. Regards, CliftonVilla.