An accurate extruder rotational distance tuned for your specific extruder head is critical, if off so will all of Klippers extrusion calculations. This should be done before other tuning and calibrations relating to extruding filament.

The best resource for demonstrating this process is 00:00:56 into this [[https://www.youtube.com/watch?v=mCcP8dffwLk|YouTube video].