-For cover letter, & other explanations, We should write or computer typing is better? (Don't laugh, pls. My handwriting is too bad

- For income proof, we can give FORM 16 (given by company) OR tax return certificate is needed?
- For profession... as i am in IT, What exactly i should mention? Software engineer?, but then my designation is System Analyst OR IT professional 'll do

- As I am an Engineer, will membership to IEEE or Institute of Engineers 'll help me anyway?
Looking for your inputs....
Thanks !
Rajan