The modern API for tax professionals. Upload your PDF, pick an IRS destination, and get a delivery confirmation. No fax machines, no phone lines, no hassle.
Host your document anywhere accessible by URL. Tax forms, signed documents, any PDF ready to transmit.
Select a pre-configured IRS fax number. SS-4, Foreign DE, or any custom destination. One parameter, done.
Receive a PDF delivery receipt with document preview, transmission details, and status. Proof of delivery, instantly.
Simple REST API. One POST request to send a fax. Integrate into any workflow, any language, any platform.
Failed transmissions are automatically retried at timed intervals. Multiple attempts ensure your fax gets through.
Every delivered fax generates a branded PDF receipt with document preview and full transmission details.
Slack alerts on every status change. Know immediately when your fax is delivered, received, or needs attention.
We maintain all IRS fax numbers for you. Just pass the destination name and we handle the rest. No need to look up, store, or remember any fax numbers.
API key authentication. Webhook verification. Full audit trail. Every event logged for compliance and peace of mind.
Create and submit forms like SS-4 directly from the API. Fill the fields, we generate the PDF and fax it to the IRS.
No SDKs to install. No complex authentication flows. Just a POST request with your API key, the destination, and your document URL.
Request API accesscurl -X POST https://api.fax2tax.com/send \ -H "Content-Type: application/json" \ -H "x-api-key: YOUR_API_KEY" \ -d '{ "destination": "IRS_SS4", "media_url": "https://your-app.com/form.pdf", "order_id": 1234 }' # Response { "success": true, "fax_id": "e3fe1f1d-bedd-4f38-be03...", "destination": "IRS SS-4" } # PDF Confirmation curl https://api.fax2tax.com/{fax_id}/confirmation \ -H "x-api-key: YOUR_API_KEY" \ -o confirmation.pdf