Dear wild bill,
if you meet the general requirements you can file electronically on line.
ELSE mail it by snail mail to:
Internal Revenue Service CenterOgden, UTNNN-NN-NNNN/p>
According to the IRS you do not require a specific address other than that. The -0027 part should get it to where it is supposed to go.
This is the standard address form for the IRS, even though some other specific IRS functions may have a seperate box number.