Hey!
Taiga has an issues module that you can activate if necessary.
Once you have this module activated, you will be able to access the place to create and manage issues:
Kanban board cards are stories. In Taiga, tasks are all the little things you need to do to complete a story. You can see them in the kanban in each story
or within the story itself.
If you are using SCRUM, you can manage tasks on your own task board. You can also attach an issue to a sprint if it is related or you plan to address it in that time frame.
This tutorial can help you get the most out of the issues module.
I hope this helps you get started. 
