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.
Diseases That Cause Muscle Twitches. Doctor and patient speaking to each other. Muscle twitches are brief, painless, involuntary movements of parts of muscles. Some are visible under the skin, others are just felt. Disorders affecting any part of the nervous system that controls movement, or the muscles themselves, can result in muscle twitches. While some of these are serious and even life-threatening, it is important to note that common, harmless conditions may also cause muscle twitches.