why could i do mom and dad did not left a will

If the land was in your parent's names, you will have to go through probate to be able to transfer or sell the land to anyone. Your brother and sister cannot sign it over to you until it is in their names (i.e., after the probate process, assuming they even get the land). Let me know if I am not totally understanding your question. Hope this helps.    You can reach Dave Rich at (303) 886-2516 or dave@flatironlegal.com. Dave Rich is an attorney licensed in Colorado. Answering your questions does not create an attorney-client relationship between us. You should speak with an attorney to whom you have provided all the facts in your case, before you take steps that may impact your legal rights. I am not obligated to answer subsequent emails or phone calls unless you have hired me. I wish you the best of luck with your situation.