Who can use this feature?
Sending is available on all plans. Receiving faxes requires a paid plan.
Accessible to All members on Web App and Mobile App.
Fax.Plus lets you fax any IRS form for free. If you need to receive the IRS's reply by fax - for example, your EIN assignment notice for Form SS-4 - subscribe to a paid plan to get a dedicated fax number.
How to send an IRS form by fax
- Log in to your Fax.Plus account and go to Send Fax.
- In the To field, enter the IRS fax number for your form, including the country code (+1).
- Click Add File and upload your completed and signed IRS form.
- Click Send.
Not sure which fax number to use? See our verified IRS fax number lookup by form and state for the current number for SS-4, 2553, 2848, 8821, and more. For Form SS-4 specifically, see our SS-4 fax number guide.
Keep proof of your submission
Once your fax is delivered, you can download a confirmation page for your records. It's available in the Faxes section of your dashboard and is also sent to your email as soon as your fax is delivered.
Receiving a reply from the IRS
Some IRS forms, such as Form SS-4, let you enter a return fax number so the IRS can fax back its response. To receive faxes, you need a fax number, which comes with any of our paid plans.
- Subscribe to a paid plan and get your fax number. See What types of numbers are available to acquire with Fax.Plus?
- Enter your Fax.Plus number as the return fax number on your IRS form.
- When the IRS replies, the fax appears in your Fax.Plus Inbox. You can also receive faxes in your email.
Note: Your fax number stays yours only while your plan is active. If you subscribe just to receive an IRS reply, keep your plan active until the fax has arrived.