New Mexico Compliance and Regulatory Resources

Withholding and Workers' Compensation Registration

Employers are required to have an active New Mexico State Withholding account number to file electronically with the New Mexico Department of Taxation and Revenue.

Paychex must be authorized as the Third-Party Administrator (TPA) on the account for making adjustments to returns and payments on your behalf.

Register new business

1. Go to Taxpayer Access Point (TAP) Business Tax ID Registration, Businesses section, and Apply for a New Mexico Business Tax ID. Review the Purpose, Eligibility ,and Information Needed sections. Click Next.
2. Continue the New Mexico Business Tax ID registration.
3. Once the registration is complete, you’ll receive a confirmation page providing you with your account number. Print and save this page.
   • Tax ID Number Format: XX – XXXXXX - XX X (11-digit number)
     • The first two digits must be 01, 02, or 03
4. Designate Paychex as the Third-Party Administrator (TPA).
   • See Designating Paychex as your Third-Party Administrator (TPA) section for instructions.
5. Enter your new account number in Paychex Flex^® to ensure your account is updated and email your Registration Confirmation document to your Paychex Service Professional.
   • Refer to the Updating Tax Agency IDs in Paychex Flex instructions to enter the information in the application.

Designating Paychex as your Third-Party Administrator (TPA)

1. Go to TAP and log in.
2. Click the Manage My Profile link in the top right corner.
3. Click the More Profile Options tab
4. In the Access panel, click the Manage Third Party Access link.
5. Click Add.
6. Follow the instructions on the screen to grant another taxpayer access to your account using the following information:
   • Name: PAYCHEX INC
   • My Email: phallings@paychex.com
   • My Phone Number: 1-585-336-7363
7. Complete the Tax information Authorization Tax Disclosure Form.
   • This form is considered as the Power of Attorney From.
8. Fax the form to 505-841-6327, Attention: Business Registration Unit. 0r submit the form to any of the district offices.

Additional Resources

• New Mexico Department of Taxation and Revenue contact information

Employers are required to have an active New Mexico State Withholding account number to file electronically with the New Mexico Department of Taxation and Revenue.

Paychex must be authorized as the Third-Party Administrator (TPA) on the account for making adjustments to returns and payments on your behalf.

Register new business

1. Go to Taxpayer Access Point (TAP) Business Tax ID Registration, Businesses section, and Apply for a New Mexico Business Tax ID. Review the Purpose, Eligibility ,and Information Needed sections. Click Next.
2. Continue the New Mexico Business Tax ID registration.
3. Once the registration is complete, you’ll receive a confirmation page providing you with your account number. Print and save this page.
   • Tax ID Number Format: XX – XXXXXX - XX X (11-digit number)
     • The first two digits must be 01, 02, or 03
4. Designate Paychex as the Third-Party Administrator (TPA).
   • See Designating Paychex as your Third-Party Administrator (TPA) section for instructions.
5. Enter your new account number in Paychex Flex^® to ensure your account is updated and email your Registration Confirmation document to your Paychex Service Professional.
   • Refer to the Updating Tax Agency IDs in Paychex Flex instructions to enter the information in the application.

Designating Paychex as your Third-Party Administrator (TPA)

1. Go to TAP and log in.
2. Click the Manage My Profile link in the top right corner.
3. Click the More Profile Options tab
4. In the Access panel, click the Manage Third Party Access link.
5. Click Add.
6. Follow the instructions on the screen to grant another taxpayer access to your account using the following information:
   • Name: PAYCHEX INC
   • My Email: phallings@paychex.com
   • My Phone Number: 1-585-336-7363
7. Complete the Tax information Authorization Tax Disclosure Form.
   • This form is considered as the Power of Attorney From.
8. Fax the form to 505-841-6327, Attention: Business Registration Unit. 0r submit the form to any of the district offices.

Additional resources

• New Mexico Department of Taxation and Revenue contact information

State Unemployment Insurance (SUI) Registration

Employers are required to have an active New Mexico state unemployment insurance (SUI) ID number and to file electronically with the New Mexico Department of Workforce Solutions (NMDWS). NMDWS refers to this Tax ID number as the Employer Account Number (EAN).

Paychex must be authorized as the Third- Party Administrator (TPA) on the account for wage detail reporting, filing quarterly, and submitting payments on your behalf. Paychex won’t be able to submit reports, returns, or payments without this access.

Register a new business

1. Go to NMDWS Employer Registration site.
2. Review the pre-registration information and prepare for the application.
   • Note the Paychex Third-Party Administrator (TPA) ID #: 500000016
3. Enter your information in the final section of the screen and select Next.
4. Once complete the registration process, you’ll be provided with an Employer Account Number (EAN) and access to the Unemployment Insurance (UI) Tax System. Print or save as a PDF.
   • SUI Tax ID Number Format: XXXXXXXX (8-digit number)
5. Enter your new account number in Paychex Flex^® to ensure your account is updated and email your Registration Confirmation document to your Paychex Service Professional.
   • Refer to the Updating Tax Agency IDs in Paychex Flex instructions to enter the information in the application.
6. Refer to Activating the UI Tax System Account to activate your account.

Activating the UI Tax System Account

1. To access your account, you’ll need your EAN and the activation password.
   • If you don’t have your activation letter,email NMDWS uitax supportor status unit.
2. Go to Unemployment Insurance (UI) Tax System.
   • For more information, you can use the Employer Activation Guide.
3. Enter your Employer Account Number and select Next to start the activation process.
4. When the activation process is complete, an Activation Complete window will open. Print and save for your records.
5. Add Paychex as the Third-Party Administrator (TPA).
   • Refer to Designating Paychex as your Third-Party Administrator (TPA) section for assistance.

Designating Paychex as your Third-Party Administrator (TPA)

1. Go to Unemployment Insurance (UI) Tax System and Login.
   • For more information, you can use the Assign a Third Party Administrator Guide
2. Select the Account Maintenance link on the left side of the page.
3. Select the Third-Party Administrator (TPA) Authorization link.
4. Select New at the bottom of the screen.
5. Enter 500000016 for the TPA ID to add Paychex as the TPA.
6. Enter the Services Begin Date and leave the Services End Date field empty.
7. Scroll down to the Un-assigned Roles section and check the boxes to assign Paychex to the following roles:
   • Account Maintenance Update and Submit
   • Payment Update and Submission
   • Employment and Wage Detail Submission and Update
8. Select Save.
9. Under Assigned Roles, select the hyperlink for Assigned Units.
10. Check the Assign All box under the Un-assigned Employer Reporting Units and select Save.
    • If this area is already greyed out, the roles have automatically been assigned. Select Save.
11. Email your Registration Confirmation and TPA Access summary page to your Paychex Service Professional.

Pro tips

• NMDWS refers to this Tax ID number as the Employer Account Number (EAN).

Additional resources

• New Mexico Department of Workforce Solutions contact information
• NMDWS Employer Guides
  • Employer Activation Guide
  • Assign a Third-Party Administrator Guide