My accountant is very understanding about this situation and he says he has no problem with it. I've never had to file late. Last year I passed him on 01APR and I picked up the next day. I think he uses turbo tax! I'm tempted to do it myself one of these years. I've a total of 5 MLPs and EPD is always the last one to issue the K-1. I've shied away from the few that often go beyond the 15 April deadline. I suppose if the dividend was high and the risk low, I'd be tempted!