Leaves extra extrusion on the back of a fill but not front

Just printing more and getting to know my Taz 3. Why does it seem to leave extra extrusion (to a point that it’s too much) on one side of the fill but not the other side? So as it swings back and forth, more is left on my side than the other?

Can you post a picture? What filament material and brand are you using?

sounds like an out of level bed or axis. A picture would help.

Here’s an image