I believe that if you are 1099'd by a company, you do need to include this as income on your 1040. This form also is sent to the IRS as a W2 would, but you would put it on a separate line on your return--not in the same place you would put your income from wages.
You are also required to pay taxes on this income like you would with wages, so hopefully you had extra taxes taken out at your job?
You also might have to fill out different forms to report this, but I would check with a tax professional on that one.