Our plan year runs May through April. When I received my 5500 information from the provider it contained the information for 13 months instead of 12. Apparently the received and credited our account with the May 2018 payment in April 2018.\n\nMy question -\- can I file a 5500 that has 13 months of payments included? And next year I will most likely only have 11 months. Do I have to file for a short year then??