This is a great list of 55 commonly Missed Tax Deductions. Some of the most tricky ones I found are:

  • Penalty on early withdrawal of savings
  • Failing to add the amount of reinvested funds (e.g., dividends) to your cost when computing gain or loss on the sale of mutual funds
  • Business gifts to a maximum of $25 per recipient
  • Mortgage prepayment penalties
  • Points or origination fees on a mortgage to purchase a residence
  • Accounting fees for tax preparation
  • Depreciation on home computers to the extent used for business or investments