What's the best online fax service to send documents to the IRS?

Do these services give you a dedicated fax number too? Or just the ability to send faxes? I might need to receive some responses back from the IRS as well.

Most of the services I mentioned provide both sending and receiving capabilities with a dedicated fax number. eFax, MyFax, and SRFax definitely give you your own fax number that the IRS can use to respond to you. Some offer free trials too, which is nice if you only need to send a few documents. The IRS typically responds by mail rather than fax, but having the ability to receive is still useful, especially if you're working with a tax professional who might fax you information.

How does the document upload work? Do they handle all different file types or just PDFs? I have some scanned documents as JPGs.

Sounds interesting but kinda skeptical. How do you know the documents actually get to the IRS and aren't just sitting somewhere? Regular fax services give you those confirmation pages with timestamps.

They accept pretty much all document types - PDFs, JPGs, even Word docs. The system converts everything to the proper format before faxing. Super convenient if your documents are in different formats. I totally get being skeptical! What convinced me was their confirmation system. You actually get both an initial confirmation when they receive your document and then a second confirmation with timestamp and transaction ID when it's successfully delivered to the IRS. The detailed delivery log has all the technical transmission data too, which is way more info than I ever got from regular fax services.

Wait, how does this actually work? Do they somehow hack into the IRS phone system or something? Sounds too good to be true.

This sounds like a complete scam. There's no way they can magically get you through to the IRS when millions of people can't get through. I'll stick to waiting on hold like everyone else instead of getting ripped off.

No hacking involved! They use an automated system that continuously redials and navigates the IRS phone tree until it reaches a human agent. Once they have an agent on the line, they call you and connect you directly. It's basically doing what you'd do manually but with technology that doesn't give up. I understand the skepticism - I felt the same way. The reason it works is that most people give up after a few tries, but their system is persistent. It's not about cutting the line; it's about having the technical capability to stay in the queue until an agent is available. There's nothing magical about it - just utilizing technology to solve a frustrating problem.

Thanks for the suggestion! Does FaxZero provide confirmation that the fax was successfully delivered? That's my main concern - I need proof the IRS actually received my documents.

Yes, they do send an email confirmation once the fax has been successfully delivered. The confirmation includes the time of delivery and the number of pages transmitted. I always save these emails as proof of submission. I'd still recommend following up with the IRS a week or so after sending anything important, just to make sure it was properly filed in their system. Even with confirmation, things can get lost in the shuffle at the IRS.

E-file is great for tax returns, but there are tons of other IRS forms that can't be e-filed. Things like penalty abatements, audit responses, and amended returns often need to be faxed or mailed. The IRS is slowly modernizing but still has a long way to go!

Thanks for explaining that. I guess I've been lucky that my tax situation has been simple enough to handle through e-file. Sounds like faxing is still necessary for more complex situations. Crazy that in 2025 we're still relying on 1980s technology to communicate with the government!

That's a great point about double-checking the fax numbers! I made a similar mistake once and it was such a headache. Do you happen to know if there's a specific page on the IRS website that lists all the department fax numbers? I've had trouble finding a comprehensive directory in the past and usually end up calling to confirm the right number, which defeats the purpose of trying to avoid phone calls in the first place.

I don't think there's one comprehensive page, but if you go to IRS.gov and search for the specific form you're submitting, the instructions usually include the correct fax number for that particular form. For example, if you're faxing Form 843 (claim for refund), the instructions will have the fax number for the processing center that handles those forms. Another trick I've learned is to look at the "Where to File" section of form instructions - they often list both mailing addresses and fax numbers by state or situation. It's a bit scattered across different pages, but at least you know you're getting the right number for your specific case. You can also try calling the general IRS number (1-800-829-1040) and ask them to confirm the fax number before sending - sometimes worth the wait to avoid having to resend everything!

@Lucas Turner I usually go to the IRS.gov website and search for the specific form instructions I m'submitting. Most forms have the correct fax number listed right in the instructions PDF - usually near the Where "to File section." For example, if you re'sending Form 843 for a refund claim, the fax number is listed in the Form 843 instructions. For general correspondence, I ve'found that calling the main IRS line and asking them to confirm the fax number for your specific situation is still the most reliable approach. I know it s'annoying to call first, but it s'better than having your documents end up in the wrong department and getting delayed for weeks or months. You can also try the Contact "My Local Office tool" on IRS.gov which sometimes lists fax numbers for specific offices, though this is more hit-or-miss in my experience.

I know exactly what you mean about finding those fax numbers! The IRS website can be a maze sometimes. What I usually do is go to irs.gov and search for the specific form I'm submitting - most forms have their corresponding fax numbers listed right on the form instructions. For example, if you're sending Form 843 for a refund claim, the fax numbers are listed by state right on the form. For general correspondence, I bookmark this page: irs.gov/help/contact-the-irs. It has a breakdown by topic and includes fax numbers for different departments. The Appeals Office, Taxpayer Advocate Service, and Audit departments all have their own dedicated fax lines. Pro tip: when in doubt, call the main IRS number (1-800-829-1040) and ask them to confirm the correct fax number for your specific situation. I know it seems counterproductive, but a quick 5-minute call to verify the fax number can save you weeks of documents being sent to the wrong department!

@Lucas Turner The IRS website can be a bit of a maze, but if you go to irs.gov and search for Where "to File or" look under Forms "and Instructions, they" usually have the specific fax numbers listed for each form. For example, if you re'sending a Form 4868 extension (request ,)the instructions will tell you exactly which fax number to use based on your state. Another trick I ve'learned is to check the actual form instructions PDF - they almost always include the correct fax number at the end. It s'way more reliable than trying to navigate their general contact pages. Just make sure you re'looking at the current year s'version of the form since fax numbers do occasionally change.

@Lucas Turner The IRS website can be a maze to navigate! I usually find the fax numbers by going to the specific form instructions rather than looking for a general directory. For example, if you re'sending Form 8822 change (of address ,)the instructions for that form will list the correct fax number for your state/region. Another trick I ve'learned is to look at the Where "to File section" of form instructions - they often include both mailing addresses and fax numbers. It s'not as convenient as having one master list, but it s'more reliable than trying to find a comprehensive directory that may be outdated. The IRS Publication 1796 IRS (Tax Products DVD used) to have a more complete listing, but I m'not sure if they still maintain it the same way. When in doubt, I still end up calling their main number and asking to be transferred to the right department to confirm the fax number - at least that s'just one quick call instead of multiple attempts to reach them later!

I don't think there's one single comprehensive page, but if you go to IRS.gov and search for the specific form number you're submitting, the instructions usually include the correct fax number for that particular form. For example, if you search "Form 941 instructions" it'll tell you exactly where to fax it. Another trick I've learned is to look up the specific IRS service center that handles your geographic area - they usually have their own dedicated fax numbers listed. It's definitely annoying that they don't have everything in one place, but at least this way you can avoid the phone call lottery!

I don't think there's one comprehensive page, but if you go to irs.gov and search for the specific form you're submitting, the instructions usually include the correct fax number for that particular form. For example, if you're faxing Form 843 (Claim for Refund), the instructions will have the fax number for that department. Another trick I've learned is to look at the "Where to File" section of form instructions - they often list both mailing addresses and fax numbers by state or situation. It's a bit scattered across different pages, but at least you can be confident you're using the official IRS-provided number for your specific need. The IRS really needs to create a central fax directory page - would save everyone so much confusion!

@Lucas Turner You re'right that the IRS website can be confusing to navigate! I usually go to irs.gov and search for the specific form number plus fax "-" that typically brings up the instruction pages which list the correct fax numbers for that particular form. For example, searching Form "1040X fax number will" show you the different fax numbers by state or region. Another trick I ve'learned is to look at the actual form instructions the (PDF version rather) than just the general website pages. The fax numbers are usually listed right in the Where "to File section" of each form s'instructions. It s'not a single comprehensive directory, but at least you know you re'getting the right number for your specific situation. The IRS also has different fax numbers for different types of submissions even within the same department, so it s'definitely worth that extra minute to double-check!

I usually find the fax numbers by going to the specific form instructions on the IRS website rather than looking for a general directory. Each form's instructions typically include the correct fax number for that particular submission. For example, if you're sending Form 843 for a refund claim, the instructions will have the fax number for the processing center that handles those forms. It's a bit scattered, but it's more reliable than trying to find a master list that might be outdated.

I don't think there's one comprehensive page, but if you go to the IRS.gov homepage and search for the specific form number plus "fax", it usually shows the correct department fax number in the instructions. For example, searching "Form 843 fax" will give you the fax number for penalty abatement requests. Another trick I've learned is to look at the "Where to File" section of any form's instructions - they often list both mailing addresses and fax numbers for different regions or situations. It's a bit scattered across their site, but at least the info is usually accurate when you find it this way.

I don't think there's one central page that has all the fax numbers unfortunately. What I usually do is go to the specific form's page on irs.gov - like if I'm sending Form 843, I'll search for "Form 843" and the form page usually has the correct fax number listed in the instructions or "where to file" section. It's annoying that it's not centralized, but at least each form page tends to have the right number. You can also try the "Contact Your Local IRS Office" tool on their website which sometimes lists fax numbers by location and type of issue.

You can find fax numbers for specific forms and departments on the individual form instructions on IRS.gov, but you're right that there's no single comprehensive directory. What I usually do is go to IRS.gov, search for the specific form number I'm dealing with, and then download the current year's instructions - the fax numbers are typically listed right in there along with mailing addresses. For example, if you're sending Form 1040X (amended return), the instructions will have the specific fax number for your state. Same goes for Forms 8857, 843, etc. It's a bit tedious having to look up each form individually, but at least you know you're getting the most current fax number that way. Pro tip: I always screenshot or save the page showing the fax number with the date, just in case there are any questions later about where I got the number from.

@Lucas Turner I know exactly what you mean about hunting for those fax numbers! The IRS website organization can be pretty frustrating. I usually go to irs.gov and search for the specific form number plus fax "-" that tends to bring up the right contact page for that particular form. For example, if you re'sending Form 4868 extension (request ,)searching Form "4868 fax will" usually get you to the page with the correct department fax number. Each form typically has its own dedicated fax line, which is why there isn t'really one master directory. The IRS also publishes contact information in the instructions for each form usually (in the Where "to File section" ,)but I agree it would be so much easier if they had one comprehensive fax directory page. Until then, form-specific searches seem to be the most reliable method!

I had the same issue finding a comprehensive list! The IRS website can be pretty maze-like. What I usually do now is go to IRS.gov and search for the specific form I'm submitting - most forms have instructions that include the correct fax number for that particular document. For example, if you're faxing Form 8453, the instructions will tell you exactly which processing center to fax it to based on your state. You can also try the "Where to File" tool on their website, which helps determine the right address/fax number based on your location and document type. It's not perfect, but it's saved me from sending things to the wrong place multiple times!

@Lucas Turner I don t'think there s'one comprehensive page, but you can find the correct fax numbers on the specific instruction pages for each form. For example, if you re'sending Form 4868 extension (request ,)the fax number is listed right in the form instructions. For audit correspondence, the fax number is usually in the letter they send you. The IRS website search function is pretty good - just search for the form number plus fax "and" it usually pulls up the right instructions. I keep a little note file on my computer with the fax numbers I use regularly since I deal with this stuff frequently for work. Saves me from having to hunt around each time!

The IRS website can be a maze! I usually go to irs.gov and search for the specific form number plus "where to file" - that usually brings up the right page with fax numbers for that particular form. For example, if you're sending Form 8822 (change of address), searching "Form 8822 where to file" will show you the processing center addresses and fax numbers. Another trick is to look at the instructions for whatever form you're sending - they almost always include the correct fax number at the end. Way more reliable than trying to find a general directory that's probably outdated anyway!

I've had the same frustration trying to find a comprehensive fax directory on the IRS website! What I've found works best is going to the specific form's instructions page - they usually list the correct fax number for that particular form or department right in the "Where to File" section. For example, if you're sending Form 843 (claim for refund), the instructions will have the specific fax number for refund claims. The IRS Publication 1214 also has some fax numbers, but it's not always up to date. I've learned to always verify the number is current by cross-referencing it with the form instructions or calling the general IRS line to confirm before sending anything important.