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.
How long will it take to process my amended tax return? A Form 1040X-Amended Tax Return can take up to 16 weeks to process once the IRS receives it. It can take up to three (3) weeks from the date you mailed it to show up in our system. Unfortunately, calling us will not help us process your return more quickly.