Lynwood, California - Basic Facts. The City of Lynwood had a population of 72,011 as of July 1, 2016. Lynwood ranks in the upper quartile for Population Density and Diversity Index when compared to the other cities, towns and Census Designated Places (CDPs) in California.
Scanning the information gives you an electronic backup of the paper indefinitely. Keep returns and all supporting documentation at least seven years. The IRS can audit your return for up to three years from your filing date, a limit applying only to good-faith errors.
First, a little background on IRS rules, which informed some of our charts: 1  The IRS says you should keep tax returns and the paperwork supporting them for at least three years after you file the return â the amount of time the IRS has to audit you. 2  Check with your state about state income tax, though.