Reduction of gene flow. However, speciation might also happen in a population with no specific extrinsic barrier to gene flow. Imagine a situation in which a population extends over a broad geographic range, and mating throughout the population is not random.
The Internal Revenue Service places restrictions on how far back you can amend your tax return, regardless of whether you owed tax or received a refund. Filers must use Form 1040X to amend a return and should only file an amendment to report certain changes. You have three years from the due date of the original return or two years from when you paid tax owing to submit an amended return. A pen next to an income tax form.
Generally, the statute of limitations for the IRS to. taxes on a taxpayer expires three (3) years from the due date of the return or the date on which it was filed, whichever is later.A return is considered to be filed on the due date of the return if it was filed on or before its due date.ownload article as a PDF. The IRS statute of limitations on action for back taxes depends on a few factors. The primary factor is whether a tax return was filed or not. The next question is how accurate (or inaccurate) the return was.