Yes. The sponsor must indicate the number of unmarried children under 21 years ogre on the Form I-864. These children can only be excluded if the children have reached the age of majority under the law in the place where they live and the sponsor does not claim the children as dependents on his/her taxes. You can read more about the affidavit of support at http://myattorneyusa.com/sponsoring-for-immigrant-visas-or-adjustment-of-status.
Answered on Apr 20th, 2016 at 3:43 PM