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Section 179 vs depreciation of laptop
I'm not a tax expert, but I think you mean Form 4562, right? If you acquire the laptop in the year for which you're filing taxes, then it is just that simple.  (At least according to my reading of 4562 instructions, and my history of accepted tax returns where I've done this for my own business.) If, however, you acquired the laptop in a previous year and have already depreciated it previously (with the plan to spread over several years), there is more complexity I believe -- you may limited in how you could accelerate the remaining depreciation.