If there's one task in the entire VA claims process worth doing immediately, before you've gathered a single piece of evidence, it's this one.
An Intent to File (VA Form 21-0966) is a simple notice telling the VA you plan to submit a disability compensation claim. It doesn't prove your condition exists or that it's connected to your service. What it does is lock in a potential effective date, the date your monthly compensation starts being calculated from, once your claim is eventually approved.
Without an ITF, your effective date is generally the date the VA receives your completed formal claim. If it takes you five months to gather medical records and write your statement, those five months are typically lost from your back pay. With an ITF filed on day one, that same waiting period counts toward your back pay instead.
Once you file an ITF, you have one year (365 days) to file the formal claim (VA Form 21-526EZ). If you file within that year, your effective date becomes the date the ITF was received, not the date of the formal claim. If the year passes without a formal claim, the ITF expires, and a new one would only lock in a new (later) date.
Set a reminder well before the one-year mark, not on it, so you have time to actually finish and submit the formal claim.
There are a few ways:
The gap between filing early and filing "when I'm ready" can be measured in real money, sometimes tens of thousands of dollars in preserved back pay for a claim that takes a year or two to fully process and approve. The ITF costs you five minutes. Waiting costs you nothing to do, and potentially a great deal to not do.