switch job from developer to QA

I am 2.5 yr of exp in IT sector as a developer in skill Microsoft Dynamic CRM 4.0 (MSCRM). m not good in coding.. every time i need someones help to do my stuff.sometimes i feel like failure because the work which is assigned to me & which sholud done from me only , but for that also i need seniors help.
i need to suggestion how to switch from dev to QA. ?
and wt are the steps need to follow so that i can change .