In general, if you live in a community property state, most property acquired by either spouse during the marriage (with some exceptions) is owned jointly and equally by both spouses. There are nine community property states: Arizona, California, Idaho, Louisiana, Nevada, New Mexico, Texas, Washington, and Wisconsin. (Alaska has adopted an opt-in community property system.) In these states, Tomorrow automatically generates a joint trust and each spouse can add assets or belongings. However, most community property states allow married couples to opt-out of community property treatment for some or all of their property by signing a marital agreement or property characterization agreement. If you think this might apply to you, consider meeting with an attorney before using the Tomorrow documents.
In all other states, each spouse will have their own individual trust to which they will add personal assets and belongings.
Finally, regardless of whether you live in a community property state or not, each spouse will need their own Tomorrow account which will be associated with the trust.