<prompt> Human: Disclaimer: I make quit a bit of money with ad revenue. I work with iPhone apps.I have already paid 60k in estimated taxes. So technically I owe 200kI deposited 53k in a SEP IRA, and have roughly 15k in expenses. computers, devices such. thats about it, what are some other tax write-offsdeductions I should apply or know about for next year? Thanks for the help. Yes, I need to invest. Thats a given.  <response>: If you make enough to owe the IRS 141,000 in taxes, you should just hire a CPA. Other than normal business deductions for supplies, office space, etc., and other than retirement plans, theres really not much youre going to be able to do, especially since it sounds like your income is astronomical. 