Can I fax Form SS-4 to the IRS?

Yes. Faxing Form SS-4 is the fastest way to get an EIN if the online application is unavailable. For US-based businesses, use 855-641-6935.

What is the fax number for Form 2553 (S-Corp)?

It depends on your state. Businesses in the Eastern US generally use 855-887-7734, while Western states use 855-214-7520.

Can I fax my 1040 tax return?

Generally, no. You must e-file or mail your Form 1040. Faxing is only permitted if an IRS agent specifically requests it during an audit or for specific disaster relief.

Is it safe to fax the IRS online?

Yes, if you use a secure service like mFax.to. We use end-to-end encryption to ensure your SSN and sensitive data remain private during transmission.

IRS Fax Numbers for Different Forms (2025 Guide)

Don't wait weeks for snail mail. Get the updated 2025 list of IRS fax numbers for Form SS-4, 2553, 2848, 4506-T, and more. Learn how to send them securely via mFax.to.

Frequently Asked Questions

Can I fax Form SS-4 to the IRS?: Yes. Faxing Form SS-4 is the fastest way to get an EIN if the online application is unavailable. For US-based businesses, use 855-641-6935.
What is the fax number for Form 2553 (S-Corp)?: It depends on your state. Businesses in the Eastern US generally use 855-887-7734, while Western states use 855-214-7520.
Can I fax my 1040 tax return?: Generally, no. You must e-file or mail your Form 1040. Faxing is only permitted if an IRS agent specifically requests it during an audit or for specific disaster relief.
Is it safe to fax the IRS online?: Yes, if you use a secure service like mFax.to. We use end-to-end encryption to ensure your SSN and sensitive data remain private during transmission.