Contact
Reach the right inbox
We're a small team. Email is the fastest way to reach us — we read every message. Use the inbox that fits your question for the quickest response.
Customer support
hello@3520file.comFiling questions, account issues, refunds, anything about your form.
Security
security@3520file.comSuspected unauthorized account access, vulnerability reports, incident notifications.
Privacy
privacy@3520file.comData subject requests under CCPA, GDPR, or similar laws. Cookie questions.
Legal
legal@3520file.comTerms of Service questions, dispute-resolution notice, formal legal notice.
Not a tax-advice line. We can answer questions about how the product works and how to file your Form 3520. We can't give you personalized tax or legal advice — for that, talk to a CPA or tax attorney. We can refer you to one if you want.