Im not sure how old the tests can be but I have mailed one that is a few months old before.

It does come out of your GI Bill fund.

I dont think you can send the form to the Los Angeles office. It needs to go to the regional office.

If you are in Los Angeles it needs to go to the Muskogee office.

Muskogee Regional Processing Office - (U. S. Department of Veterans Affairs)

this is the form you need to send to your regional office:

http://www.vba.va.gov/pubs/forms/21-4138.pdf

Include a copy of the results of the CLEP printout after you pass that has the score info etc..

I just write in the remark section of the form. Requesting reimbursement for recent CLEP/DANTES exam. (I dont think they reimburse the test center fee only the CLEP fee) They usually process mine within a few weeks. the refund will pop up in your account. Make sure your info is up to date with them.