Home and Community-Based Care Act of 1983 - Amends title XIX (Medicaid) of the Social Security Act to authorize a State to provide home care services to all individuals (currently, limited to individuals 18 years of age or younger) who are disabled, as defined in title XVI (Supplemental Security Income) of the Act, and with respect to whom it has been determined that: (1) they can receive appropriate care outside an institution; and (2) they would have to be institutionalized (but for such home care) at a cost that is equal to or greater than the cost of home care.

Amends the Internal Revenue Code to provide a tax credit for a taxpayer who maintains a household for a disabled dependent as described in the above paragraph. Provides that the maximum allowable credit shall be $750.