Step 1: From your Dashboard, click the Roster button at the top of your screen.

Step 2: Hover your mouse over the artist, and click the Pencil icon.

Step 3: On the left-hand side menu select the Invoices tab and turn on the Use Custom Invoice Id Sequences toggle.

Step 4: Once you have added the Prefix, use the Save button to save the sequence.

Each new artist invoice you generate will automatically follow the sequential order, increasing by +1 (e.g., if the last invoice was 001, the next will be 002, then 003, etc.).