Guides
Short, practical answers to the paperwork questions people ask most — written by Grace Whitfield after fifteen years of helping small offices with forms.
How to fill out a W-9 PDF (line by line)A plain-English walk-through of every line on IRS Form W-9, how to fill and sign the PDF on your computer or phone, and how to send it back safely. How to sign a PDF on an iPhoneSign a PDF on your iPhone with your finger: using FormFlow in Safari, Markup in the Files app, or a Mail attachment. Step by step, no app to install. How to scan documents to PDF with your phoneGet scanner-quality PDFs from your phone camera: light, background, angle and filter tips, plus how to make multi-page and searchable PDFs for free. Are electronic signatures legal in the US?What the federal ESIGN Act and state UETA laws say about electronic signatures, which documents are excluded, and what makes one hold up. Not legal advice.
Looking for a blank form?
Our free templates — an invoice, a permission slip, a sign-in sheet and a rental application checklist — are fillable PDFs you can complete online. For tax forms such as the W-9 or W-4, always download the current version from irs.gov.
Curious how FormFlow can edit PDFs without uploading them? Read how FormFlow keeps your files on your device.