Seniors' Tax Simplification Act of 2015

This bill directs the Internal Revenue Service to make available to taxpayers who have turned age 65 at the close of the taxable year a new federal income tax Form 1040SR (similar to the existing Form 1040EZ). Such taxpayers can use this new form even if their income includes: (1) social security benefits; (2) distributions from qualified retirement plans, annuities, or other such deferred payment arrangements; (3) interest and dividends; or (4) capital gains and losses.