# Guides

Practical help for sending and receiving faxes.

## [How to receive an IRS 147C letter by fax](https://dearfax.com/guides/how-to-receive-irs-147c-letter.md)

Request written confirmation of an existing EIN and prepare a receiving number before you call the IRS.

## [How to fax Form SS-4 for an EIN](https://dearfax.com/guides/how-to-fax-ss4-for-ein.md)

Choose the correct IRS route, prepare a signed SS-4, and include a working return fax number for your EIN application.

## [How to fax from an iPhone](https://dearfax.com/guides/how-to-fax-from-iphone.md)

Send a PDF or a paper document from your iPhone. This guide walks through preparing the file, sending it in Safari, and checking delivery.

## [How to fax a PDF](https://dearfax.com/guides/how-to-fax-a-pdf.md)

Send a PDF to a fax number from your browser. Here’s how to check the document, add a cover page, and confirm delivery.

## [How to fax from Android](https://dearfax.com/guides/how-to-fax-from-android.md)

Fax a saved document or a paper form from your Android phone. Use your browser to prepare the pages, send them, and check delivery.

## [How to fax from a computer](https://dearfax.com/guides/how-to-fax-from-a-computer.md)

Send a fax from a Windows PC or Mac using your browser. Prepare your files, add paper documents from your phone, and track delivery.

## [How to get a fax number](https://dearfax.com/guides/how-to-get-a-fax-number.md)

Choose an online fax number for receiving documents, sending replies, and sharing access with your team. No phone line or fax machine needed.

## [How to send a fax from Gmail](https://dearfax.com/guides/how-to-fax-from-gmail.md)

Send PDF or image attachments to a fax number from Gmail with DearFax. Set up email to fax, format the address, and track delivery.

## [How to send a fax from Outlook](https://dearfax.com/guides/how-to-fax-from-outlook.md)

Send documents to a fax number from Outlook with DearFax. Set up your sending account, attach the files, and check delivery.

## [How to send a fax with ChatGPT](https://dearfax.com/guides/how-to-send-a-fax-with-chatgpt.md)

Connect DearFax to ChatGPT, attach your document, review the fax, and confirm sending.

## [How to send a fax with Claude](https://dearfax.com/guides/how-to-send-a-fax-with-claude.md)

Prepare a fax with Claude and DearFax, review the document and recipient, and confirm the send.

## [How to send a fax with Codex](https://dearfax.com/guides/how-to-send-a-fax-with-codex.md)

Connect Codex to DearFax through MCP, prepare a document, and send it after reviewing the saved fax.

## [How to send a fax with Gemini](https://dearfax.com/guides/how-to-send-a-fax-with-gemini.md)

Prepare a document in Gemini, save a final PDF, and send it to a fax number through DearFax.

## [How to send a fax with Microsoft Copilot](https://dearfax.com/guides/how-to-send-a-fax-with-microsoft-copilot.md)

Use Microsoft Copilot to prepare a document, save a finished PDF, and send it through DearFax.

## [How to summarize incoming faxes in Slack with AI](https://dearfax.com/guides/how-to-summarize-incoming-faxes-in-slack.md)

Use a DearFax webhook to trigger document reading, create a short summary, and notify the right Slack channel.

## [How to extract fax data into Google Sheets with AI](https://dearfax.com/guides/how-to-extract-fax-data-to-google-sheets.md)

Turn incoming fax pages into structured spreadsheet rows using DearFax webhooks and an AI extraction workflow.

## [How to process faxed purchase orders with AI](https://dearfax.com/guides/how-to-process-faxed-purchase-orders-with-ai.md)

Receive a purchase order in DearFax, extract its line items, and create a draft order for your team to review.

## Topics

- [AI faxing](https://dearfax.com/guides/ai-faxing.md): Prepare and send documents with AI assistants, or build workflows around incoming faxes.

- [Receiving faxes](https://dearfax.com/guides/receiving-faxes.md): Turn incoming faxes into summaries, spreadsheet entries, and draft orders for review.

- [Sending faxes](https://dearfax.com/guides/sending-faxes.md): Send documents from your phone, computer, or browser, and check delivery.

- [Email to fax](https://dearfax.com/guides/email-to-fax.md): Send attachments from your email account and manage cover messages and delivery.

- [Fax numbers](https://dearfax.com/guides/fax-numbers.md): Choose a fax number, receive documents, or transfer an existing number.