A veteran is entitled to get a 100% disability rating if he or she can establish that his service connected disability (ies) debars him from obtaining any meaningful employment to sustain his livelihood. Total Disability ratings are based upon Individual Un-employability or (TDIU). Navigating these kinds of claims are a tricky process and veterans will often be denied for simple errors. This is why you require an experienced attorney. A professional that can review and handle your claim can mean the difference between acceptance and denial.