i don't know, if this is the right place for this thread, but do anyone know of any tutorial for webtoon making, step by step .

________________
hey

There is no specific method for webcomic. I don't know about tutorial, but the basic steps are:

1. Rough draft of a chapter. You can do that anywhere as it doesn't matters much.
2. Draw the characters by using Photoshop (not compulsory) in a drawing tablet.
3. Artists prefer to draw backgrounds seperately in a 3D model function so that the characters can be placed in any location without having to draw background scene for different angles every time.
4. Coloring the panels. It also includes shadowing, etc... The time taken varies on your skill.
5. Placing word bubbles on panels.

There is no thing as a fix guide. Every artist has his own style. Many artists reveal their work style in extra chapters.

________________

As far as drawing goes you could also give Inkscape a try (a vector based graphics program) or even use both vector based program and raster based one like Photoshop.

There are a lot on deviant art.

Try this one to start:
http://minyi.deviantart.com/art/Digital-Manga-Tutorial-134439901

You will need editing program like Photoshop CSS, which does raster as well as vector (basically has functions of the older versions of Illustrator and Photoshop into one program) also really helps to have a tablet (I have a Wacom and recommend it, I think they might still come with Essentials (Adobe) which is like a scaled down version of Photoshop, but still gets the job done for drawing/digital painting etc.

Yep, deviantart is great for this. If you couple manga tutorials with panel tutorials, should work out to be a webtoon somewhat http://browse.deviantart.com/art/Comic-Panel-Tutorial-195035590

________________
R-18 below

Detective Horror Series

Tracker BakaBT

Few more helpful hints, Screentones, stamps, patterns can be really useful for backgrounds, effects, etc. There are a bunch on this site, including image packs and the link (although these are generally if you want to look more like traditional manga, but can also be useful for color/webtoon too):

http://psychobob.xepher.net/screentonez/

(you can also make your own pretty easily) Here is a kinda long, but thorough tutorial on screentones, making and applying:

http://www.youtube.com/watch?v=6jCE_rAMbKw (pt 1)
http://www.youtube.com/watch?v=2GdEhFVSbvo (pt 2)

deviant are has many, like if you are looking for some specific ones, feathers, blood splatters, etc.

Also, this is a very good site for practicing figure drawing, has pose-able mannequin you can place in any position

http://www.posemaniacs.com/

Lots of layout templates here (I believe most are going to be standard magazine/industry sizes, although you probably want to go bigger and scale down for detail/sharpness ):

http://manga-apps.deviantart.com/gallery/25320254