If you cannot
file your tax return before the deadline, you will need to complete
Form
4868,
"Extension of Time to File" and mail it before April 15,
2008. This will extend the deadline for filing your return to August
15th, 2008.
HOWEVER, if you owe any
taxes, you must still mail your estimated tax payment by April 15th
or you will be assessed penalty and interest as of April 16th, on any
payment owed.
Mailing address for all non-resident alien tax forms, including Form 4868 and/or payment check:
Internal Revenue Service
Austin, TX 73301
Be sure to sign and date the forms and keep copies for your records.