Lenticular Clouds (lens shaped clouds) can form in the crest of the mountain waves if the air is moist. Roll Clouds can also occur in the rotors below the waves if the air is moist. These clouds are a good indication of the presence of mountain waves but, if the air is dry, there may not be any cloud to see.
Statute of Limitations. The statute of limitations for taxpayers to receive refunds is three years from the date the return was filed or two years from the date any tax was paid for the tax year in question. This doesn&amp;rsquo;t preclude you from filing a return.
You must file a federal income tax return for any tax year in which your gross income is equal to or greater than the personal exemption amount and standard deduction combined (per the Form 1040 Instructions for the corresponding tax year). Generally, you need to file returns going back six years. Copy: You can request a copy of your tax return, but in most cases you must pay a fee to do so (currently $50). 2  Use Form 4506, Request for Copy of Tax Return (PDF), to request a copy of your tax return. 3  Copies of Forms 1040, 1040A, and 1040EZ are generally available for 7 years from the date you filed the return.