My mother surname is different she use her family name and in my passport my mother surname got printed has my surname, now i've stamping she already had us tourist visa so when i'm filing ds160 ,so should i give her surname has original or what ever a

My mother surname is different she use her family name and in my passport my mother surname got printed has my surname, now i’ve stamping she already had us tourist visa so when i’m filing ds160 ,so should i give her surname has original or what ever appear in my passport should i use that

If you are applying for visa, you must use names exactly as on your passport.