The Internal Revenue Service is digging in and standing by its claim that illegal immigrants are eligible for back tax credits if they get Social Security numbers. Under Barack Obama’s executive amnesty, four million illegal immigrants can apply for Social Security numbers. An unknown number of them will be able to claim back tax credits – even though Obama’s “law” doesn’t require them to pay back taxes. In a letter to Sen. Chuck Grassley, IRS Commissioner John Koskinen wrote, “Section 32 of the Internal Revenue Code requires an SSN on the return, but a taxpayer claiming the [Earned Income Tax Credit] EITC is not required to have an SSN before the close of the year for which the EITC is claimed.” Gee, remember a time when the IRS was this friendly to U.S. citizens? More…