I keep a loose tally throughout the year and have a folder on my computer that holds all my receipts (PDF’s and scanned docs), but this is the time of year that I start adding up actual numbers to see what my deductions might add up to. This is also the time I consider buying any new equipment for my business so I can get that write-off if I need it. In thinking about what I can and cannot deduct from my income, I refer to a bunch of sites and books that offer advice on deductions I have used before and ones I have never even thought of.