You can use business code 541990 - All Other Professional, Scientific, and Technical Services

Codes begin on page C-17 of IRS pub below.

https://www.irs.gov/pub/irs-pdf/i1040sc.pdf

561410 : Definition of NAICS Code 561410: This industry comprises establishments primarily engaged in one or more of the following:

Letter or resume writing;
Document editing or proofreading;
Typing, word processing, or desktop publishing; and
Stenography (except court reporting or stenotype recording), transcription, and other secretarial services.