For 2010 i have filed my CA returns as resident i.e. 540
and now i want to change my CA filing to CA
non resident i.e 540NR . ( i have my W2 from other state
as proof to show that i have stayed in CA for part year)

below are my questions :
1. is this amendment possible ?
2. can i use 540x for the same ? or
3. do i need to use any other forms ?
4. Any suggestions ?

Thanks
-S