How can a trustee of a grantor trust change from the "traditional" filing method to one of the optional filing methods after the first year?

Request a new EIN for the trust and use the optional method under the new number.

File a final Form 1041 for the year before the filing method is changed and attach a statement indicating that the return will be the final Form 1041 filed for the trust.

Instruct the grantor to include an election statement with their individual return.

Discontinue grantor-trust status for one year and re-establish it in the following year.