The provision emerged from President Donald Trump’s campaign pledge to end taxes on Social Security. But experts say many are excluded.

The Senate passed the "Big, Beautiful Bill" by a single vote. However, before it can make its way to Trump's desk and officially into law, the bill will go back to the U.S. House of Representatives, which will look through and attempt to approve the Senate's changes.

The White House has said workers benefiting from the deduction could see up to $2,000 in annual federal tax savings.