February 28, 2018 18:22 Updated Follow The amount in Box 5 represents the non-taxable portion of your annual distributions. Related articles Which payments are included on the 1099-R form? What does the Withdraw Non-Taxable Portion/Monthly ASA payment option mean? Will I still get my 1099 on time? I am retired and left my INPRS account with the Indiana Public Retirement System at the time I retired. Do I have to take a distribution of my account once I reach age 70 ½? What is Social Security Integration?