1. Your position must be valid for sponsorship.
2. Make salary certificate from your company (min. salary must be 4K)
3. sometime they will ask for house contract also, it should be attested from municipality if it is personal if it is rented by company It has to be mention on Contract letter.
4. Job contract. (sometime they will ask your contract to be attested also)
5. If private company bank statement for last 6 month, if Government no need.
6. If the avobe mention document is ready visit nearest immigration and apply.