yes thiere is : the form I-864 and the tax return and transcript for the one who will fill it as sponsor and his w2 or 1099 or paystub, his domicile like driver liscene, his us status like passport, and for civil document u should upload all what they want with the translation copy if they not in english.

nvc is super process very fast n the documents needed r easy . was dq very quickly

@MH Had and @Dianne crowell thank you both