New and Small Business Assistance by the U.S. Dept. of Labor:

This webpage provides general information about particular laws administered by Wage &  Hour Division and DOL, and other helpful federal resources that are often applicable to new and small businesses.
https://www.dol.gov/whd/smallbusiness.htm

Compliance Assistance Toolkits by the Wage &  Hour Division, Dept. of Labor:

Compliance assistance toolkits answer the most frequent questions about federal labor standards, and include posters that meet federal labor law notice requirements. Includes FMLA, FLSA, child labor laws and government contracts.
https://www.dol.gov/whd/regs/compliance/CAKits.htm

Employment Law Guide:

Laws, Regulations, and Technical Assistance Services from the Department of Labor. This Guide describes the major statutes and regulations administered by the U.S. Department of Labor (DOL) that affect businesses and workers. The Guide is designed mainly for those needing “hands-on” information to develop wage, benefit, safety and health, and nondiscrimination policies for businesses.
https://webapps.dol.gov/elaws/elg/index.htm

Federal Employment Law Overview:

Quick Guide for New and Small Businesses
https://www.dol.gov/WHD/regs/compliance/NewBus3.pdf

Overtime, Hours Worked and Deductions from Pay:

U.S. Department of Labor Wage and Hour Division short videos to assist employers in complying with the Fair Labor Standards Act (FLSA)
https://www.dol.gov/whd/flsa/videos.htm

Posters:

You may download all required federal and state posters at ODJFS Forms Central Internet Website: www.odjfs.state.oh.us/forms/findform.asp?formnum=02745

Workplace Posters from the U.S. Department of Labor

https://www.dol.gov/general/topics/posters

I-9 Employment Eligibility:

Forms and Employer’s Manual from U.S. Citizenship and Immigration Services
https://www.uscis.gov/i-9

E-Verify:

E-Verify is a web-based system that allows enrolled employers to confirm the eligibility of their employees to work in the United States
https://www.e-verify.gov/

Family Medical Leave Act (FMLA):

Forms and instructions
https://www.dol.gov/whd/fmla/

Transportation:

For employers of safety-sensitive transportation employees
https://www.transportation.gov/odapc/employer