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Avoid These Common Mistakes When Filing 1099s

Filing 1099 forms correctly is essential for staying compliant with IRS regulations and avoiding costly penalties. Whether you’re a small business owner or a tax professional using Adams Tax Forms Helper, these tips will help you steer clear of common errors.

Last updated:
February 2026

Along with a list of important filing dates, here are some things to consider about tax deadlines and timely filings.

Missing or Incorrect Taxpayer Identification Numbers (TINs)

One of the most frequent mistakes is failing to include the correct TIN for contractors and payers. Always verify this info using the Helper’s add-on TIN Check service before submitting a 1099.

Misclassifying Workers

Ensure you’re issuing 1099s only to independent contractors, not employees (W-2s). Misclassification can lead to IRS audits and penalties.

Forgetting State Filing Requirements

Some states require separate filings in addition to federal submissions. Check your state’s rules to avoid compliance issues.

Using the Wrong Form

There are multiple types of 1099 forms (e.g., 1099-NEC* for non-employee compensation, 1099-MISC for miscellaneous income). Make sure you’re using the correct one for each payment type. Also, make sure you’re using current 1099 paper forms in order to file correctly with the IRS. Adams offers 1099 forms, envelopes, and more.

*Excess Golden Parachute Payments have moved from the 1099-MISC to box 3 of the 1099-NEC!

Missing Deadlines

Deadlines matter! For tax year 2025 filings (due in 2026):

  • February 2, 2026: Furnish 1099-NEC to recipients and eFile or paper file with the IRS.
  • March 31, 2026: eFiling deadline for the 1099-MISC.
  • For a list of comprehensive filing dates, please click this link.

Important: If a deadline falls on a weekend or federal holiday, the due date shifts to the next business day. For example, if January 31 lands on a Sunday, the deadline moves to February 1.

Not Keeping Records

Maintain copies of all 1099s and related documentation for at least four years. This protects you in case of audits. You can print or save digital copies of your tax forms right in the Helper.

Adams Offers Corrections

If you do need to make corrections to your forms, Adams Tax Forms Helper has a straightforward process for amendments. This add-on service makes it simple and easy to correct your 1099s and more!

At Adams, we’re here to help you get through tax season and make time for what really matters. Let’s get filing!

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Where to File

File your red ink Copy A 
of Form W-2 with a Form W-3 to the following address:

Social Security Administration Direct Operations CenterWilkes-Barre, PA 18769-0001 
(for Certified Mail Use ZIP code 18769-0002)

File your W-2c (correction forms) and W-3c at the following address:

Social Security Administration Direct Operations CenterP.O. Box 3333 Wilkes-Barre, PA 18767-3333.

Lower eFile Limit

Reduce the 250-return threshold enacted in prior regulations to generally require electronic filing by filers of 10 or more returns in a calendar year. The final regulations also create several new regulations to require e-filing of certain returns and other documents not previously required to be e-filed.

Count All Returns

Require filers to aggregate almost all information return types covered by the regulation to determine whether a filer meets the 10-return threshold and is required to e-file their information returns. Earlier regulations applied the 250-return threshold separately to each type of information return covered by the regulations.

More Businesses Must eFIle

Eliminate the e-filing exception for income tax returns of corporations that report total assets under $10 million at the end of their taxable year, and require partnerships with more than 100 partners to e-file information returns, and they require partnerships required to file at least 10 returns of any type during the calendar year to e-file their partnership return.

Efficient andReliable

Corrections must be filed the same way the original was submitted. If you eFile the original then you must eFile the correction. If you mailed in the original then you must mail in the correction.

Do not cut or separate Copies A of the forms that are printed two or three to a sheet, except for Form W-2G. Generally, Forms 1097, 1098, 1099, 3921, 3922, and 5498 are printed two or three to an 8" x 11"sheet. Form 1096 is printed one to an 8" x 11" sheet.

These forms must be submitted to the IRS on the 8" x 11" sheet. If at least one form on the page is completed, you must submit the entire page. Forms W-2G are an exception and may be separated and submitted as single forms. Send your forms to the IRS in a flat mailing (not folded).

Do not staple, tear, or tape any of these forms. It will interfere with the IRS’s ability to scan the documents.

Pinfeed holes on the form are not acceptable. Pinfeed strips outside the 8" x 11" area must be removed before submission without tearing or ripping the form. Substitute forms prepared on continuous feed or strip form paper must be burst and stripped to conform to the size specified for a single sheet (8" x 11") before they are filed with the IRS.

Do not use a form to report information that is not properly reportable on that form. If you are unsure of where to report the data, call the information reporting customer service site at 1-866-455-7438 (toll free).

Do not submit anything other than red ink copies to the IRS.

Use the official forms or substitute forms that meet the specifications in Pub. 1179. If you submit substitute forms that do not meet the current specifications and that are not scannable, you may be subject to a penalty for each return for improper format. All of Adam’s tax forms meet the proper requirements, so use us as a resource.

Do not use dollar signs ($) (they are pre-printed on the forms), ampersands (&), asterisks (*), commas (,), or other special characters in money amount boxes.

Do not use apostrophes (’), asterisks (*), or other special characters on the payee name line.

No photocopies of any form are acceptable.

Do not print plain ink copies of your W-2 copy A or W-3 form. If a box doesn't apply to you, leave it empty.

Do not add "0".

Do not omit the decimal point and cents from entries.

Do not mistakenly check the “Retirement plan” checkbox in box 13. See page 22 of this IRS PDF for Retirement plan details.

Do not misformat the employee’s name in box e. Enter the employee’s first name and middle initial in the first box; his or her surname in the second box; and his or her suffix (such as “Jr.”) in the third box (optional).

Do not enter the incorrect employer identification number (EIN) or the employee’s SSN for the EIN.

Do not cut, fold or staple Copy A paper forms mailed to SSA.

Do not mail any copy other than Copy A of Form W2 to the SSA.

Correct Type 1 errors

File the correct form with the correct amount, code, checkbox, name or address, and check the “CORRECTED” box. This overwrites what you originally filed with the IRS under that person or company’s name and TIN. Send the corrected form to the recipient and prepare the red Copy A to send to the IRS with the Form 1096 transmittal if you’re paper filing. If you also had the wrong recipient/payee name or TIN do a Type 2 correction instead.

Correct Type 2 errors

For Type 2 errors, either the recipient/payee name and/or the TIN are wrong or you used the wrong form (like a 1099-MISC instead of a 1099-NEC). Action: This is a two-step process. First, you must zero out what you filed with the IRS under the wrong name/TIN and then file the new form.

Step 1

File a form with the CORRECTED box checked and the exact same payer and recipient information as on the incorrect form, but with all the amounts 
as zeros. This will remove the originally filed form from the IRS records.

Step 2

File a new Form 1099 with the right information as an originally filed form (not a corrected form).

Correct Type 3 errors

Incorrect Payer Name, Payer TIN, or both Action: Write a letter to the IRS.
If you filed with the wrong payer name (yours or your client’s name/company name) or the wrong payer taxpayer identification number (TIN), you don’t need to send in a corrected form.

Instead, you should write a letter containing the following information:
Name and address of the payer
Type of error (including the incorrect payer name/TIN that was reported)
Tax year Payer TIN Transmitter Control Code (if you eFiled),
Type of return, Number of payees, Filing method (paper or eFiling)

If you’re filing 10 or more information returns, STOP!

You have exceeded the IRS paper filing threshold and are required to file electronically.

Know when to file

You have exceeded the IRS paper filing threshold and are required to file electronically.

Know where to file

Send all information returns filed on paper to the following:

If your legal residence or principal place of business or principal office or agency is outside the United States, file with the Internal Revenue Service, Austin Submission Processing Center, P.O. Box 149213, Austin, TX 78714.

State and local tax departments: Contact the applicable state and local tax department for reporting requirements and where to file.

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