How do I claim my Grandmother as my dependant?

I've done this recently for my mom. CPT AuBuchon's DFAS link is correct. Just follow the instructions and fill out the paperwork and you will fax in the documentation to the dependency section at DFAS. Once they make a determination on dependency, they will mail or email back the forms required to add your parent into DEERS. The entire process takes about 90 days from submission on your part. Just check in every month to get a status on the application. They were finished for about two weeks and they didn't notify me. I took the paperwork that was mailed to me into my servicing DEERS office and they enrolled her into DEERS and gave her a dependent ID card. Tricare is another story though. My mom only qualified for Tricare Direct Care. There was a better program before, however due to sequestration, the program was defunded. Hope this helps you out.

Were you ever able to claim your wife's grandmother? Starting a similar situation with my mother-in-law. Do you have any advice? Thanks