Radcrow,
I think I found some bad news regarding your refund. Before I post it, remember, this is not legal advice. As with all the information I post on this site, it is only information. In addition, I have no particular expertise in tax issues and you should not rely on this. You should talk to a tax advisor if you have questions.
There is a case,
Lovett v. US, that I found which discusses a very similar fact pattern as what you described. The claim for the refund was time barred. I did not have a chance yet to find if this case has subsequent appellate history or if it has been overturned, so there may be hope yet. I will post what I find, but it may not be today or tomorrow.
As far as what the memo suggests, this is the part that applies in your circumstances: "
In an attempt to secure a refund from IRS, you must mail to the IRS
copies of your Individual Tax Return (or amended return, if appropriate) for the year in which
you received your severance pay, original IRS Form W-2, corrected IRS Form W-2 provided by
DFAS, VA disability award documentation, DD Form 214, separation orders, and the enclosed
sample cover letter #4."
It looks like the time limit is not something St. Clair can adjust. If this is so, there should be a change in the law. It strikes me as very unfair.