Welcome to the PEB Forum!
Based upon the information given, it would seem that you may qualify for DoD CRDP if you are a disability retiree who earned entitlement to retired pay under any provision of law other than solely by disability, and you have a DoVA disability rating of 50 percent or greater. You might become eligible for CRDP at the time you would have become eligible for retired pay. Therefore, if eligible, you would be entitled to receive
both military retired pay and Veterans Affairs compensation.
Bottom line is that with 22 years AFS and the assumption that you entered active or reserve military service after September 7, 1980, you shall receive 55% of the average of the highest
36 months of basic pay which will be subject to federal income tax. As a direct result from any PEB finding, additional entitlements of military compensation benefits may be warranted. For example, a combat-related finding on a PEB-referred "unfit for duty" medical condition shall result in your DoD disability retired pay not being subjected to federal income tax withholdings. Also, a DoD disability rating greater than 55% (in your particular situation) shall yield a higher military disability retired pay amount.
So, unless your migraines medical condition found by the FPEB to be "unfit for duty" was also found to be combat-related and/or has a DoD disability rating greater than 55%, you will not have any financial gain in your DoD military disability retired pay. If you are able to get more medical conditions to be found "unfit for duty" by the FPEB, then your opportunity to receive a higher DoD disability rating of greater than 55% should occur accordingly. Moreover, if any of those additional medical conditions (i.e., PTSD) also have a combat-related finding, then your DoD military disability retired pay will be exempt from federal income taxation.
With that all said in my opinion, you need to decide what is definitely important to you (and your family) while still in the DoD IDES MEB/PEB process? Do the math computations for the different scenarios of potentially receiving a federal income tax exemption to include different DoD disability ratings greater than 55% up to the maximum 75% limitation as based upon your medical conditions symptomology which could qualify as being deemed "unfit for duty" by the FPEB.
Lastly, what advice is your FPEB attorney recommending to you at this particular point in time while in the DoD IDES process, also? Oh, you may also want to consider applying for SSA SSDI federal disability compensation since you stated "I probably won’t be able to work and have to move with my brother" if that actually occurs. Take care!
Thus, I quite often comment that "possessing well-informed knowledge is truly a powerful equalizer!"
Best Wishes!