3 to 7 Years. Keep receipts that support tax deductions for three to seven years. The Internal Revenue Service can randomly audit your return up to three years after the filing date or if it suspects you made an error. That deadline extends to six years if it believes you underreported income by 25 percent or more.
Why do muscles twitch. When we experience involuntary muscle contraction and relaxation, it is known as a muscle twitch. A muscle twitch is the result of an electronic impulse sent to that particular muscle by a nerve that is out of voluntary control for the moment at least.Muscle fasciculation can exhibit in different forms and in different degrees, but the most common form of the phenomenon is twitching of the eyelids.iabetics may experience involuntary muscle twitches due to the effect of insulin, but there are other drugs as well, which are known to affect the nervous system in such a way that certain muscles begin to twitch.
The common, less serious causes of muscle twitching include: 1  exercise. 2  stress and anxiety. 3  caffeine and other stimulants. 4  nutritional deficiencies. 5  smoking. 6  irritation of the eyelids or surface of your eye. 7  reaction to drugs, such as corticosteroids, stimulants, and estrogen.hen a nerve is stimulated or damaged, it may cause your muscle fibers to twitch. Many twitches experienced in your body are common and may go unnoticed. However, other types of twitching may be a sign of a nervous system condition and should be checked out by your doctor.