Resources all Neptune 4 Owners should be familiar with:

The Neptune 4 Wiki

While the coverage of assembly and set up is authoritative, its method for bed leveling should be avoided and SCREWS_TILT_CALCULATE used instead.

• Neptune 4
• Neptune 4 Max

The canonical 3D print troubleshooting page (which is pinned on the r/fixmyprint Reddit) is located at https://www.simplify3d.com/resources/print-quality-troubleshooting/
 Consult and try its recommendations before asking questions about print quality issues you may experiencing.

The Klipper docs, including the Klipper gcodes which are different from Marlin 
They’re on your printer. Also online at https://www.klipper3d.org/

Documentation: 
https://github.com/SoftFever/OrcaSlicer Wii: https://github.com/SoftFever/OrcaSlicer/wiki


Also see https://www.obico.io/blog/orcaslicer/ Watch: Orca Slicer getting started guide - https://youtu.be/cquTCpz1V74 Also watch: https://youtu.be/MqQak88YafU?si=0YMAO-EVmKvTNIMc

A well regarded tuning guide, geared to Voron based Klipper printers yet still relevant, https://ellis3dp.com/Print-Tuning-Guide/

WildRose Builds' tuning guides are generally good, yet ignore for bed leveling and setting the gcode z offset as there are better alternatives.

• How to Tune The Elegoo Neptune 4 Klipper 3D Printer for Better Print Quality (Step-by-Step Guide)\\Good coverage for tuning Extruder Rotational Distance and aligning the gantry.
• ULTIMATE 3D PRINTER TUNING GUIDE for the ELEGOO Neptune 4 plus / pro / max

https://www.obico.io/blog/orcaslicer-3d-printer-calibration/

Bambu Labs, while designed with their printers in mind, have some excellent references and troubleshooting how-tos that apply in most cases to all printers, and focuses around Bambu Studio as the slicer, from which Orca is based so lots applies. In case related directly to the printer most everything can be interpolated to the N4 series accordingly. https://wiki.bambulab.com/en/knowledge-sharing/common-print-quality-problem https://wiki.bambulab.com/en/knowledge-sharing/troubleshooting-printing-issues https://wiki.bambulab.com/en/filament-acc/filament/slice-param