From AZ Central:
Louis DeSipio, a professor of political science and Chicano/Latino studies at the University of California, Irvine, said immigrant workers may provide information about their employment history to demonstrate that they were in the United States before the Dec. 31, 2011, cutoff date. That could help government officials determine whether appropriate Federal Insurance Contributions Act, or FICA, payroll taxes, which fund Social Security and Medicare, have been paid, he said. “If it’s obvious in those employment records that they have not been paying taxes, I think in that case they would make some effort to collect those funds,” DeSipio said. “Nothing that I’ve read suggests that they are going to go back to the beginning of their migration, which in many cases is the late 1990s.”

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