forget to write pin code in OMR sheet

No problem...

i don't they will take harse steps in examination form for such small matter, be practicle, be positive

Nothing to worry about it...!!

DONT WORRY......IT IS NOT A BIG MATTER. NOTHING WILL HAPPEN. THEY WILL ACCEPT YOUR FORM, YET IT IS BETTER IF U WRITE A LETTER TO ICAI THAT U HAVE DONE A MISTAKE IN FORM. SO KINDLY IGNORE THAT........REGARDS