When setting up a Turnitin Assignment, it is important to ascertain what type of assessment has been set for the module for you to then be able to select the correct set-up. Please read Before you set-up a Turnitin Assignment for guidance.
In addition, although Turnitin can accept a variety of file formats, submissions must meet a set of requirements for Turnitin to be able to return a Similarity report.
How to set-up a Turnitin Assignment in Blackboard Ultra
Please note if you require to set-up a Turnitin Assignment in Blackboard Original you will need to use the newer standard of integration called LTI (Learning Tools Interoperability).