Keeping Promises to Taxpayers Act of 2012 - Amends the Internal Revenue Code and the Patient Protection and Affordable Care Act to repeal certain health care-related taxes and other provisions, including: (1) the requirement that certain employers provide their employees with health insurance coverage and report on such coverage, (2) the excise tax on excess benefits from employer-sponsored health care coverage, (3) the requirement that distributions from a health savings account be used to pay for prescription drugs and insulin only (thus allowing for payment of over-the-counter medications), (4) the increase (from 7.5% to 10%) in the income threshold for the medical expense tax deduction, (5) the $2,500 limitation on contributions to health flexible spending arrangements, (6) the annual fees required for businesses providing health insurance and manufacturers or importers of branded prescription drugs, (7) the Patient-Centered Outcomes Research Trust Fund, (8) the fee imposed on insured and self-insured health plans, (9) the excise taxes on medical device manufacturers and importers and on indoor tanning services, (10) the increase (from 10% to 20%) in the penalty for distributions from health savings accounts and Archer medical savings accounts not used for qualified medical expenses, and (11) the increase in the tobacco production excise tax.