From www.IRS.gov:  IRS Tax Tip
Some people must pay taxes on part of their Social Security benefits. Others find that their benefits aren’t taxable. If you get Social Security, the IRS can help you determine if some of your benefits are taxable.
Here are seven tips about how Social Security affects your taxes:
1. If you received these benefits during the year,  you should have received a Form SSA-1099, Social Security Benefit Statement, showing the amount.
2. If Social Security was your only source of income in 2013, your benefits may not be taxable. You …