fyllyoTax Forms
W-9
Request for Taxpayer Identification Number and Certification
Fyllyo uses local AI to interpret your documents, calculate required answers and fill PDF forms. Review the answers and their sources before saving, without uploading client documents.
A simpler way to prepare a PDF.
Pick a form
Choose a built-in template or set up your own blank fillable PDF once.
Add client documents
Drop in PDFs, scans, photos, Word files or typed notes. The AI reads them on your computer.
Review and save
Check the source lines, confirm key facts and edit the PDF. Uncertain values stay blank and flagged.
Form reference
Before you begin.
Use these notes as a starting point. Check the issuing agency’s current form and instructions for your client’s situation.
Open the source PDFFyllyo helps prepare PDFs. It doesn’t provide legal or tax advice, determine eligibility, or file forms for you.
Gather Your W-9 Details
Collect your legal name (as shown on your tax return), business/disregarded entity name (if any), federal tax classification (e.g., Individual/sole proprietor, C-corp, S-corp, Partnership, LLC), address, and your TIN (SSN or EIN). If you claim exemptions from backup withholding or FATCA, have those codes ready. This prep helps you finish in minutes with no guesswork.
Details worth checking
Name–TIN Mismatch
If the legal name on Line 1 doesn’t match the IRS name associated with the SSN/EIN, payers may get “B-Notices” and withhold backup tax from your payments. Mismatches also delay 1099 reporting.
Wrong or Multiple Federal Tax Classifications
Checking more than one box or choosing a classification that doesn’t fit your structure (common with LLCs) leads to invalid W-9s and re-requests from payers.
Incomplete or Outdated Address
Missing unit numbers or outdated addresses cause 1099s to go to the wrong place, risking missed tax documents and scramble at year-end.
Improper Exemption Claims
Claiming backup-withholding or FATCA exemptions without meeting criteria can cause compliance issues and payer follow-ups.
Foreign Status Not Disclosed
Entities with foreign ownership or connections sometimes forget required disclosures, which can trigger FATCA/withholding questions or requests for different forms (e.g., W-8 series).
Unsigned or Undated Certification
A W-9 without a signature and date isn’t valid. Payers can’t rely on it and may apply backup withholding until they get a signed form.
Using an Out-of-Date Form
Submitting an old W-9 version can prompt payers to request a new one, slowing onboarding and payments.
Not Updating After Changes
Name, address, classification, or TIN changes require a new W-9. Failing to resend can lead to reporting errors or backup withholding.
Cross-Field Inconsistencies
Details that don’t line up—like claiming an LLC classification but providing an SSN for an entity EIN field—create confusion and rejections.
Set up your own form once.
Fyllyo’s cloud service prepares a reusable template from your blank fillable PDF and setup instructions. No API key is required. Client documents stay on your computer, and subsequent filling runs locally. Check the first few filled forms carefully.
Mac with M1 or later · 16 GB memory recommended · About 8 GB free disk space