An estate has been opened for x who also happened to have a Revocable Trust set up with his disabled wife. The reason an estate was opened after his death some assets were discovered not in the name of the Trust. Most of his assets are in the Trust and the banks want a Trust EIN. The question is the estate will be closed after six months, the Trust will remain open due to his disabled spouse still being alive. When opening the EIN for the Trust should Section 645 be marked yes or no. Thank you for any assistance.