Hi, my husband died 9+ years ago and I was told I didn't qualify for benefits because I wasn't 60. So only my 2-year-old son was granted benefits.

Now it turns out it was a mistake (my appointment was yesterday). They'll look into the archives Monday. Additionally, they said my son could have received benefits since birth because of his dad being on disability. That is an additional 2.5 years of benefits.

What should I expect? When will they pay me back? We are talking about $100+ I was entitled to by law but weren't paid. Will they pay interest? Will they adjust for inflation? How will taxes be handled?
Thanks.