@StarUniversal Try looking on the computer or the special research computer to find this task.
Using a computer or laptop will allow your Sim to access career-specific interactions. These can be found via the Careers menu followed by the Law Career sub-menu.
To complete the Work From Home Assignment for this career, your Sim will need to use an Electromagnetic Research Archive Machine. These can be found in the Student Commons or you can purchase one from Buy Mode.