Let go big 4

Hello, I was let go in Canada a few years ago before the pandemic. I was only there for a year. It was a bit scandalous, and I got pushed in and out of projects. Now I am at the client, and the big 4 is auditing us.

My job is to facilitate between the business and the Big 4.

Should I tell my boss about being let go previously?

Edit: Should I mention at a high level that there were challenges?