What do you enter as youngest retirement age for a form csa 1099r from opm for disability if you are retired from military

The minimum retirement age for OPM is 55.

As a rule, retirement age is the earliest age you are eligible to receive a pension or annuity from your employer, if you had not been disabled.   If you retire on disability, the payments you receive are taxed as wages until you reach the minimum retirement age.

Yes I am  over the retirement age.  I am 75 years old.  Can my income taxes be  updated?

Check the entry you made for date of birth in the "Personal Info" section