ProntoFax is now in the Claude directory. Fax from a chat.

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Notes

Short pieces on why an office still asks for a fax, and what to do when one asks you. Every agency number we reference is on its own page, with the date we last verified it.

How to fax your local Social Security office

There is no single Social Security fax number. Each field office has its own. Where the number comes from, how to find your office, what to put on the cover sheet and how to send from your phone.

How to fax medical records to a doctor's office, and how long it takes

Who sends your medical records, when a signed release is needed, where to find the fax number, what goes on the cover sheet, and how long a fax takes to arrive.

Open enrollment documents: who takes them by fax

HealthCare.gov does not take documents by fax. Six state exchanges publish a fax line for them. The 2027 dates, what you may be asked to prove, and which door to use in your state.

ProntoFax is in the Claude directory

You can now send a fax from a Claude chat. Claude looks up the verified fax number in the ProntoFax directory, and you pay $2.99 only when the fax is delivered.

Medicaid work requirements: dates and what to send

Most states start Medicaid work requirements in January 2027, and Iowa starts December 1, 2026. When your state starts, what counts, what proof to keep and where to send it.

How to fax your Medicare Part B form (CMS-40B) to Social Security

The CMS-40B says mail or fax it to your Social Security office. Here is what to send, where to find the fax number, and how to do it from your phone.

What you can and can't fax to the IRS

If you filed an extension in April, your 2025 federal tax return is due October 15, 2026, and you cannot fax it in.

The time tax has a fax machine in it

Annie Lowrey, a staff writer at The Atlantic, has a new book called The Time Tax about the hours the government makes people spend proving they deserve help.