After you file

IRS TAX TIP 2001-30 - https://www.irs.gov/pub/irs-news/at-01-30.pdf
HOW TO PREPARE YOUR TAX RETURN FOR MAILING
WASHINGTON -- Your tax return is complete and ready to be mailed. Before
sealing that envelope, take a few minutes to make certain that all information is
complete and accurate. Avoid mistakes that may delay your refund or result in
correspondence with the IRS.
Here are just a few items to complete prior to mailing your tax return:
 Sign your return. Your federal tax return is not considered a valid return
unless it is signed. If you are filing a joint return, your spouse must also
sign.
 Provide a daytime phone number. This may help speed the processing of
your return if the IRS has questions about items on your return. If you are
filing a joint return, you may provide daytime phone numbers for either you
or your spouse.
 Assemble any schedules and forms behind your Form 1040/1040A in the
order of the "Attachment Sequence No." shown in the upper right hand
corner of the schedule or form. For supporting statements, arrange them in
the same order as the schedules or forms they support and attach them
last.
 Attach a copy of Forms W-2, W-2G and 2439 to the front of Form 1040.
Also attach Forms 1099-R if tax was withheld.
 Use the coded envelope included with your tax package to mail your return.
If you did not receive an envelope, check the section called "Where Do You
File?" inside the back cover of the your tax instruction booklet. You may be
mailing your return to a different service center this year because the IRS
has changed the filing location for several areas to provide better customer
service.
 If you owe tax, make your check or money order payable to the "United
States Treasury." Write your name, address, Social Security number,
daytime telephone number and "2000 Form 1040" (or appropriate form
number) on your payment. Then complete Form 1040-V following the
instructions on that form and enclose it in the envelope with your payment.
Do not attach the payment to your return.
For more information, refer to your tax instruction booklet or visit the IRS Web
site at www.irs.gov