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What Is Real-Time TIN Matching?
Real-time TIN matching validates that a taxpayer’s legal name matches their TIN on file with the IRS. As you enter or upload filer and recipient information, eFileMyForms checks those combinations behind the scenes and flags any mismatches so you can correct them before you submit.
With name/TIN mismatches being a common trigger for CP2100/CP2100A “B-Notice” letters and backup withholding obligations, catching issues early helps you avoid penalties that can reach hundreds of dollars per form.
Why Teams Choose eFileMyForms:
Reduce rejected filings
Catch TIN/name mismatches before submitting to the IRS so you’re less likely to receive B-Notices after filing.
Save time on cleanup
Fix issues while you’re already working on forms and avoid hundreds of hours spent on corrections and data errors.
Increase accuracy and compliance
Ensure all of your recipients have accurate Name/TIN combinations upfront and protect your business from fraud and reduce the risk of potential IRS audits and penalties.
Flexible verification workflows
Verify TINs from multiple locations in your account:
- Filer/company setup pages
- Recipients/payers list
- Directly inside individual forms as you prepare them
Individual or bulk checks
Verify a single TIN as you add a new contractor or validate entire recipient lists in bulk before filing season.
Who Benefits from Real-Time TIN Matching?
If you’re regularly sending out 1099s and want to avoid IRS notices and penalties, real-time TIN matching gives you extra confidence in every return.
Small businesses paying independent contractors, freelancers, and service providers
AP and payroll teams managing 1099 and W-2 forms
Accountants and bookkeepers who file on behalf of multiple clients
Online sellers and marketplace merchants who rely on clean vendor and payee records
Common Questions About Real-Time TIN Matching
FAQ
What is a TIN mismatch?
A TIN mismatch happens when the name and TIN you report on an information return don’t match what the IRS has on file—because of typos, name changes, missing digits, or incorrect entity types. These mismatches often trigger CP2100/CP2100A notices and may require you to send B-Notices and start backup withholding if not fixed.
Does real-time TIN matching guarantee I’ll never get a B-Notice?
Real-time TIN matching significantly reduces the risk by helping you verify most name/TIN issues before you file. IRS B-Notices are sent when what you file doesn’t match IRS records. Running real-time TINs before you file can reduce this risk and save you time post filing season.
Do I need an IRS e-Services account to use Real-Time TIN Matching?
No. eFileMyForms handles the connection and validation behind the scenes. You simply enable the service and run checks from within your account.
Which forms can I use Real-Time TIN Matching with?
You can use TIN matching with the information returns supported by eFileMyForms, such as 1099, 1098, 5498, W-2, and 1042-S.
When should I run real-time TIN checks?
- When adding a new recipient or vendor
- When a payee updates their name, business type, or TIN
- Before you finalize your year-end filing
- Any time you want extra confidence that your records are accurate