Very sorry for your loss. If tax was withheld from the benefit you received then you should receive a tax document of some sort--likely a 1099-- in late January/early February. You can include that document and your SSA1099 on a tax return to seek a refund. We cannot say whether you will receive all of it back---we have no information as to the amounts involved.
Post back when you receive the tax documents if you need help with entering them.
**Disclaimer: Every effort has been made to offer the most correct information possible. The poster disclaims any legal responsibility for the accuracy of the information that is contained in this post.**