TDIU pays at the 100% rate when your service-connected conditions keep you from working — even if your combined rating is below 100%. Answer a few questions to see whether you may meet the schedular gate and the unemployability basis. Educational only.
You should never pay anyone simply to file an initial claim. A free, VA-accredited Veterans Service Officer (DAV, VFW, American Legion, or your county/state office) can prepare, file, and appeal for you at no cost. Verify any representative at VA.gov/ogc/apps/accreditation and find a county service officer through NACVSO.org.
This free tool is a taste. The VA Disability Playbook walks the whole claim — service connection, the C&P exam, the rating math, appeals, TDIU and SMC, survivors, and where to get honest help. Get the free Start-Here primer and a launch notice.