Here is some information on starting a handyman business in the state of Washington. You may want to start here: How to Start a Handyman Business.
The state of Washington has a number of websites to help you get started with your business: http://business.wa.gov/start.html and http://bls.dor.wa.gov/startbusiness.aspx and http://www.oria.wa.gov/site/alias__oria/345/our_business_services.aspx
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-Register your handyman business name.
Find out more here: http://business.wa.gov/start.html#businessname
-Select your handyman business structure.
Determine what business structure you wish to have: Sole-proprietor, LLC, Partnership, Corporation, etc. http://business.wa.gov/start.html#businessstructure
-Register your handyman business.
If you are forming an LLC or Corporation, you need to register your business. http://business.wa.gov/start.html#getregistered
-Open a Business Checking Account.
You will need to open a separate bank account for your handyman business with your new business name.
-Find out about taxes, hire an accountant.
You may want to file your own taxes if you are a small company. As you grow, it will be easier to have an accountant do the work. More information about taxes here: http://business.wa.gov/start.html#taxnumber and http://www.irs.gov/Businesses/Small-Businesses-&-Self-Employed/Starting-a-Business .
-Get Liability Insurance.
-Register as a Contractor.
You may need to register as a contractor. Find out more here: http://www.lni.wa.gov/tradeslicensing/contractors/howreg/default.asp
-Get Health Insurance.
Since you will be self-employed, you will need your own health insurance. If you have employees, you will need a plan that will include their health needs also.
-Be aware of other regulations.
You may be required to obtain a license to operate your handyman business in a particular locale, whether you are a resident, or not. You may need to apply for permits, and be subject to inspections. You need to be aware of building codes. You may be subject to OSHA regulations: http://www.osha.gov