You can only amend a return back 3 years and get a refund. However, in your case you need to go back 4 years to 2011 and it would result in you paying back some taxes, along with penalties for each year you amend that was previously incorrectly filed. It is my understanding (I don't know this for a fact) that you can file a form 3115 to request a "change in accounting method" so that you can get things right either this year or next, without having to file four years worth of amended returns. I do not know how it works, but I'm tagging
@TaxGuyBill who would most likely know more about this than me. The form 3115 can be seen/obtained at <a rel="nofollow" target="_blank" href="
https://www.irs.gov/pub/irs-pdf/f3115.pdf">https://www.irs.gov/pub/irs-pdf/f3115.pdf</a> and I note that one of the selections on it is for a change in depreciation/amortization - which is what you need for what I believe would be one year only. But let's wait for TGBill and see what he says so we're both educated on this.
