Indian applicants must complete the DS-160 form for all US nonimmigrant visas, including B-1/B-2 visitor visas, F-1 student visas, H-1B work visas, and K fiancé (e) visas. This online application is a mandatory first step for anyone seeking temporary entry into the US. It should be submitted through the US Department of State's Consular Electronic Application Center (CEAC) website.