Timing
Filing early
In several states, filing before your VA letter arrives preserves your effective date — the claim is decided later but dated from when you filed.
Why it can matter
We have not verified whether Delaware preserves an effective date on an incomplete application. Because it can be worth a full year elsewhere, ask your County assessor directly rather than assuming either way.
What to do
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April 30
The annual filing deadline with the county assessment office; the property tax itself must be fully paid by year-end.
See all the datesThis is general information about published law, not legal or tax advice for your situation.