This morning, when requesting my donor advised fund to send money to send money to the Episcopal Church USA to support the General Convention this summer, I struggled to find the Tax ID for the national church. To find the number, I turned to the Wikipedia, specifically Episcopal Church (United States) - Wikipedia to learn the following tidbit:

The full legal name of the national church corporate body is the "Domestic and Foreign Missionary Society of the Protestant Episcopal Church in the United States of America", which was incorporated by the legislature of New York and established in 1821. The membership of the corporation "shall be considered as comprehending all persons who are members of the Church". This should not be confused with the name of the church itself, as it is a distinct body relating to church governance.

For my future giving to various Episcopal organizations (which all have distinct Tax ID numbers), I compiled the following table: