If you retired due to a disability, the pension you receive through a company-paid plan counts as wage income until you reach the minimum retirement age (the age at which you can receive a pension if not disabled). This may be reported on a W-2.
Once you reach that minimum retirement age, the pension is no longer reported as wage income but as pension income, which is reported on a 1099-R.
Click this link for info on Reporting Disability Income.
**Say "Thanks" by clicking the thumb icon in a post
**Mark the post that answers your question by clicking on "Mark as Best Answer"