Retirement tax questions

The OMB 1545-0119 is a Statement of Survivor Annuity Paid.  The Gross distribution is 32052.00 and the taxable amount is unknown.  765.60 was withheld for federal taxes.  It was paid by the Office of Personnel Management, Retirement Operations, PO Box 45, Boyer, PA [social security number removed].  I don't see were to enter this on the income tax form.