Hey Jatin !

According to the most recent infirmation brochure  of UPSEE ,a candidate who has passed the examination of UPSEE with minimum qualifying marks , has to upload the domicile of his FATHER OR MOTHER ONLY. NO other domicile certificate will be considered. So i do not think you can upload the domicile certificate of your sister.

You can also download the information brochure for admission under UPSEE By following the given ljnk :

https://www.google.com/url?sa=t&source=web&rct=j&url=https://upsee.nic.in/publicinfo/Handler/FileHandler.ashx%3Fi%3DFile%26ii%3D265%26iii%3DY&ved=2ahUKEwj9nvnfrNjiAhUTEnIKHTvpC1AQFjAAegQIBBAC&usg=AOvVaw0cLK_Fsqg-dg-kyohLv469

Hope it helps!