What are the immediate steps to resolve an E4 error on an HP Smart Tank 580 printer?

To immediately resolve an E4 error, first, turn off the printer and unplug it. Then, carefully open all printer access doors (front, top, and rear if applicable) and thoroughly inspect the paper path for any jammed paper or foreign objects. Gently pull out any jammed paper in the direction of the paper path and ensure the print carriage moves freely. Close all doors and plug the printer back in.