File tax-turn
I choose FedEx to send documents. source Just go straight to the counter and ask someone to do it.
Send to IRS
If you elect to use a private delivery service (PDS), you will want to use the addresses in the table below instead of the by-state addresses. source
Department of the Treasury
Internal Revenue Service
Austin, TX 73301-0215
USA
Illinois link
PO BOX 19041
SPRINGFIELD IL 62794-9041
California Resident link
Franchise Tax Board
PO Box 942840
Sacramento CA 94240-0001
North Carolina link
North Carolina Department of Revenue, PO Box R, Raleigh, NC 27634-0001.