From the National VA Cemetery Website: (https://www.cem.va.gov/burial_benefits/)
Burial benefits available include a gravesite in any of our 136 national cemeteries with available space, opening and closing of the grave, perpetual care, a Government headstone or marker, a burial flag, and a Presidential Memorial Certificate, at no cost to the family. Some Veterans may also be eligible for Burial Allowances. Cremated remains are buried or inurned in national cemeteries in the same manner and with the same honors as casketed remains.
Burial benefits available for spouses and dependents buried in a national cemetery include burial with the Veteran, perpetual care, and the spouse or dependents name and date of birth and death will be inscribed on the Veteran's headstone, at no cost to the family. Eligible spouses and dependents may be buried, even if they predecease the Veteran.
The Veterans family should make funeral or cremation arrangements with a funeral provider or cremation office. Any item or service obtained from a funeral home or cremation office will be at the family's expense. The VA created Planning Your Legacy: VA Survivors and Burial Benefits Kit, to assist Veterans and their family members in pre-need planning and record storage.