How long after retirement do you have to submit a disability claim? What is a good organization to assist with this?

As soon as possible and you can go to any Veterans Service Office in your local community and they will help you there.  You can also go to an American Legion or Veterans of Foreign Wars office.

All, 

You can file at anytime you desire, it just depends on how quick you want compensation and benefits, when I was in DC a few years back getting validated for upgrade on the eBenefits site, there was a Vietnam vet there starting his process for the first time. It is best to start before retirement now for many since the program is set up to help with easier transition. I would say most of them are about the same, it just depends on the circumstances and what you need help with or done. 

I filed my claim 180 days out from retirement July 6, 2011 and did not get a rating until June 9, 2012. Like one of the other comments sign up for the VA Benefits page so you can track it.  

I was a little late in filing. I didn't even think I was qualified to apply until I ran into somebody that worked for the VA. I filed six years after discharge October 2010 and it took them until this June to finalize everything to a point. I was awarded 40% with back pay to 2010 and now I'm in the process of appealing what was denied. I'm looking for a VSO now. I did everything on my own to this point.

I think you have 12 years... you should talk to the Disabled American Veterans (DAV), they'll square you away Top.

All thanks for the feedback. You have been helpful. 

I have gone through this process recently.  You can submit your claim up to I believe 180 days prior to exist which is recommended.  Start preparing a year out to ensure everything is in your records.  The claim can take 6-9 months before approval, you can track the process through ebenefits.  Use AMVETS, they can help big time!

If you submit your claim within 364 days of getting out, you get back pay. I would say that doing it before that would be a good idea. Its the old "hurry up and wait" thing. I submitted the claim and then waited 25 months for a rating, and they still owe me half my back pay...going on 4 years now

If you are still active its better do file prior to getting out of the service. You can file within six months of your retirement date.