This is always a tough one because there is no telling what has happened at the IRS' end to mess this up. Check the letter that you received creating the trust and make sure that you have entered the name exactly as it is on the letter. If you have then you need to either mail a paper return or contact the IRS and find out what's going on with them (typos do happen). This close to the deadline it may be best to mail a paper return and then contact them after April 18th.