Tully’s Metadata supports adding Splits and basic Deal Memos. On Web, you will need to click the Ownership tab to get started:

Here you can add multiple collaborators and choose their roles (Composer, Producer, Engineer, etc.) and input any unique identifiers such as collection society affiliation (e.g. ASCAP, BMI) and even the Artist Apple or Spotify ID.

In the Ownership column, you can input your splits to create a Split agreement, or to outline a Deal Memo.

The Metadata can be shared at any point as a link, or you can download and email to others.