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.
Common Causes of Muscle Twitches. Twitching of the eyelids, thumb or calf muscles in the legs are common and, according to the University of Maryland Medical Center, caused by anxiety or stress.This benign twitching comes and goes, usually not lasting for more than a few days.uscle twitches, also called fasciculations, usually only affect a single muscle. They're characterized by tiny contractions inside the muscle, caused by a nerve impulse. Muscle spasms, also called muscle cramps, affect multiple muscle tissues and are brought on by a chemical imbalance in the body.