The new evidence that is required is classed as information that was not already submitted to the VA when they made a decision. Information is deemed to be relevant evidence if it proves or disproves something that is contained in your case
What forms must be completed when filing a supplemental claim with new evidence to VA?
You must complete a Decision Review Request: Supplemental Claim VA Form 20-0995, this form can be downloaded from the website
After submitting a supplemental claim with new evidence, what happens next?