A Social Security tax break will give back thousands of dollars to some seniors - but there is a significant catch.

The Social Security Administration reportedly sent out an email claiming the policy bill “eliminates federal income taxes on ...

The bill is deeply unpopular - with nearly 2-to-1 opposition, according to a Washington Post-Ipsos poll conducted in June.

An email from the agency praised the bill, but only some recipients will see savings. Here's the legislation means for seniors.