You can file a supplemental claim if yo provide new evidence to the VA that has not been seen before and is relevant to the case.
How long do I have to file a supplemental claim?
You have one year to file a supplemental claim of the decision only if you have new evidence and if you have a fiduciary claim.
Also, I need to find out a claim. Do you have information on how to get an opinion from a senior reviewer?
A senior reviewer will take another look at your case and determine whether the decision can be changed based on a difference of opinion or an error.
is that the higher level review I heard about or is that different?
Yes, in a Higher-Level Review you are asking for another review of the same evidence, and a senior reviewer will take another look at your case.
can I get more help as I go through this process?