Should I consider that i print work orders at home before going to the field and perform the work 100% work done at the home office?

Probably. If your home is your only office location, then say assign 100% of your income to the home office.

Thank you sir 

For anyone reading this, that this may apply to, be aware that job related expenses for a W-2 job are not deductible at all on the federal tax return. This includes a home office.