Im using todoists rest api to track my own data but it seems like it only allows you to fetch active tasks?
I was looking at filters and thinking they may help me but there is no documentation on this.
Im trying to fetch all tasks completed on a certain day, Can this be done?
Completed tasks are not implemented in the REST API yet. To be able to retrieve completed tasks, you should be using the Sync API: https://developer.todoist.com/sync/v8/#get-all-completed-items