In 2012, the IRS began verifying the validity of voluntary tax withholding (VTW) amounts
                  on tax returns pre-refund due to an increase in identity theft with non-compliant
                  VTW claimed on Social Security benefits.  Therefore, if the taxpayer elects voluntary
                  federal income tax withholding on their Social Security benefits, a copy of Form SSA-1099
                  must accompany their federal tax return to verify the claimed VTW. The Social Security Benefit Statement
                     Instruction Sheet, Form SSA-1099-F2-INST now instructs beneficiaries to attach a copy of their Form
                  SSA-1099 to their federal tax return if an entry appears in the VTW box on the form.