Your law firm has an interdepartmental structure. As you meet all the requirements detailed in each department description, you will be able to expand your premises to add new workplaces, hire more people, or unlock new upgrades.
Check the green arrow over the Delivery Room. That indicates that you can level it up!
The same happens with the lawyers' offices. Try to complete the upgrades the rank tiers to improve their boosters!
*Read carefully all the requirements needed to expand your offices and departments in their descriptions!
**If you reached the vault's max level and there are some pending upgrades, please take in mind that new content updates will bring more upgrades, so you will be able to advance further in the game. The team is working on it!