Retirement tax questions

I received a 2511 form from IRS indicating I didn't claim income from a 1099R IRS received but I never received from the Trustee who wired the money to the 457b plan.

They are under the impression I pocketed the entire amount on the 1099R. They are unaware it is a Rollover.

I'm not sure how I am going to rectify this other than show the IRS that the entire amount of money was deposited in the 457b plan.