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541990

All Other Professional, Scientific, and Technical Services

Sector: 54 — Professional, Scientific, and Technical Services

Where You'll Use NAICS 541990

Business Registration

State LLC/Corp filings often ask for your primary NAICS code.

Tax Returns

IRS Schedule C and business tax returns use NAICS for industry classification.

SBA Loans

Small Business Administration uses NAICS to determine size standards and loan eligibility.

Government Contracts

Federal and state contracts are classified by NAICS code. Required for SAM.gov registration.

Related NAICS Codes

Related Resources

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