No, it is a pension and you are 70 1/2, so it just wants to make sure you are taking out what you need to, which you are.
You will answer, "Yes this is RMD, All is RMD, and Yes I took all I was required to take, and then you are done with that part.
The taxable amount that is less than the gross, this difference is what you contributed while working for the U. S. Government.
Thank you for your Civil Service work.