My spouse received lump sum disability for 2012-2016. Most was paid back to the LTD insurer. We paid tax on it during previous years. Do we have to pay tax on it again?

As stated, we paid taxes each year on the income from the LTD insurance payments. Once we received the lump sum, most of the money was sent right back to them. Do we have to pay taxes on this money again? Or is there a way to offset it? If so, how?