Hi! I'm new to this forum so if I posted in wrong section please be polite on me

Is there any option in krita to draw lines like in illustrator/flash? I mean when I drew a line, illustrator auto correct it/ smooth it. Same thing in Flash. How to achieve this in krita?

The Freehand Path tool does that to some extent. You can choose the curve option in the tool settings and then increase the optimize value.

Have you checked out the smoothing and stabilizer settings at all? Those might help you achieve the result you are after.

https://www.youtube.com/watch?v=YpXT_Mx_u6k

Flash and illustrator are vector tools, so I'd say, try the vector layers in Krita.