What are the steps to get buried in Arlington National Cemetery?

https://www.arlingtoncemetery.mil/Funerals/Scheduling-a-Funeral/Establishing-Eligibility

A Simple google search provided this answer

Your first stop needs to be the VA burial page. This will help find all the hoops and ladders and start the process. Just understand that Arlington is quickly filling up. That and the wait list to be buried there is quite long. For example R. Lee Ermey passed away and had his memorial service in April 2018 but wasn't buried in Arlington until January 2019.

https://www.va.gov/burials-memorials/schedule-a-burial/

Arlington expects to work with a Funeral Director. A Funeral may be scheduled only after the required documentation (listed below) is submitted and approved. (See https://www.arlingtoncemetery.mil/Funerals/Resources-for-Funeral-Directors)

Required Documentation
DD214 or equivalent service documentation showing honorable discharge and active duty service. (Mandatory for a veteran; not required for the second interment of spouse if ANC can verify the veteran's eligibility from historic archived records.)
Death certificate.
Cremation certificate, if applicable.
Succession documents for the person authorized to direct disposition (PADD) to act on behalf of the primary next of kin (PNOK).
Other documents, as requested by the cemetery.
When the family or funeral home makes the first call to the customer service center at [login to see] , they are given a case number for tracking purposes and are asked to e-mail all required documents for review. The cemetery staff will need to establish and confirm that the service member is eligible for burial at Arlington. Documents can be e-mailed to [login to see] and must include the case number provided by the customer service center. Please Note: Arlington National Cemetery will not respond to other inquiries via this email box.