What it is
VA Form 21-0966 is the Intent to File a Claim for Compensation and/or Pension, or Survivors Pension and/or DIC. It tells VA you plan to file but need time to put the full application together. Under 38 CFR 3.155, VA will treat your eventual complete claim as filed on the date the intent to file was received, as long as the complete claim arrives within one year.
When you use it
Use it when you know you have a claim but need weeks or months to pull records, line up a nexus opinion, or decide which conditions to list. Survivors use it before filing for DIC or Survivors Pension. If you file your disability claim directly online at VA.gov, you do not need to submit a separate 21-0966, starting the online application counts.
What to gather before you fill it out
Your full legal name, SSN or VA file number, date of birth, current mailing address, and which benefit type you intend to claim (compensation, pension, survivors pension, or DIC).
How to submit
Online through VA.gov, by mail or fax to the Claims Intake Center (PO Box 4444, Janesville, WI 53547-4444), in person at a VA regional office, or by calling VA at 800-827-1000 to record an oral intent to file, which VA documents in writing.
Common pitfalls
Missing the one-year window, if your complete 21-526EZ is not in by then, the effective date resets to the new filing date and you can lose months of back pay. Filing a second intent to file before submitting a complete claim does not extend the original deadline. Forgetting to sign and date the paper form makes it invalid.
Related forms
21-526EZ (disability compensation), 21P-527EZ (pension), 21P-534EZ (DIC / survivors pension).
Sources
https://www.va.gov/find-forms/about-form-21-0966/ https://www.law.cornell.edu/cfr/text/38/3.155 38 CFR 3.155