When legal and equitable title merge, that typically indicates one party (or more than one) own the property outright without trust as the "umbrella". In other words, a trust splits ownership (usually) between the trustee, who has legal title (ownership) , and the beneficiary(ies), who have equitable title/ownership. That is inherent in the nature of a trust.
Whether or not a 1041 is required to be filed would be dependent upon whether the trust is considered to be a grantor trust (one in which the grantor owns, or has certain powers over, the assets held in the trust).
If that is the case when your mother passes, then the trust would become a grantor trust and you would likely own the property outright.
Beyond the foregoing, although I am a lawyer, you should seek counsel in your jurisdiction from someone who can review all of the terms of the trust but, hopefully, you have a better understanding of how a trust would work in regard.
