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Internal Revenue Service

US government agency responsible for tax collection and tax law enforcement. Provides downloadable income tax forms, instructions, agency publications.

New Mexico Taxation & Revenue Department

New Mexico Taxation and Revenue Department provides state income and business tax forms and information.

Form SS-4

Application for Employer Identification Number

Instruction Form SS-4

General Instructions for Form SS-4

Form W-4

Personal Allowance Worksheet

Form W-9

Request for Taxpayer Identification and Certification

Instruction Form W-9

General Instructions for Form W-9

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