Form 1120X (Rev. 11-2016)
If the corporation receives its mail in care of a third party
(such as an accountant or an attorney), enter on the street
address line “C/O” followed by the third party’s name and street
address or P.O. box.
Enter the amounts from the corporation’s return as originally
filed or as it was later amended. If the return was changed or
audited by the IRS, enter the amounts as adjusted.
Enter the net increase or net decrease for each line being
changed. Use parentheses around all amounts that are
decreases. Explain the increase or decrease in Part II.
Note: Amounts entered on lines 1 through 4 in column (c) must
equal the amounts that would be entered on the applicable lines
of the tax return if all adjustments and corrections were taken
Lines 1 and 2. Add the increase in column (b) to the amount in
column (a) or subtract the column (b) decrease from column (a).
Enter the result in column (c). For an item that did not change,
enter the amount from column (a) in column (c).
Line 4. Figure the new amount of tax using the taxable income
on line 3, column (c). Use Schedule J, Form 1120, of the original
return to make the necessary tax computation.
Line 5e. Enter the amount of tax deposited with Form 7004,
Application for Automatic Extension of Time To File Certain
Business Income Tax, Information, and Other Returns.
Line 5g. Include on line 5g any write-in credits or payments,
such as the credit for tax on ozone-depleting chemicals or
Line 8. Enter the amount from the “Overpayment” line of the
original return, even if the corporation chose to credit all or part
of this amount to the next year’s estimated tax. This amount
must be considered in preparing Form 1120X because any
refund due from the original return will be refunded separately
(or credited to estimated tax) from any additional refund claimed
on Form 1120X. If the original return was changed by the IRS
and the result was an additional overpayment of tax, also
include that amount on line 8.
Line 10. Tax due. If the corporation does not use electronic
funds transfers, including the Electronic Federal Tax Payment
System (EFTPS), enclose a check with this form and make it
payable to the “United States Treasury.”
Line 11. Overpayment. If the corporation is entitled to a refund
larger than the amount claimed on the original return, line 11 will
show only the additional amount of overpayment. This
additional amount will be refunded separately from the amount
claimed on the original return. The IRS will figure any interest
due and include it in the refund.
Line 12. Enter the amount, if any, to be applied to the
estimated tax for the next tax period. Also, enter that tax
period. No interest will be paid on this amount. The election to
apply part or all of the overpayment to the next year’s
estimated tax is irrevocable.
Who Must Sign
The return must be signed and dated by:
• The president, vice president, treasurer, assistant treasurer,
chief accounting officer, or
• Any other corporate officer (such as tax officer) authorized to
If a return is filed on behalf of a corporation by a receiver,
trustee, or assignee, the fiduciary must sign the return, instead
of the corporate officer. A return signed by a receiver or trustee
in bankruptcy on behalf of a corporation must be filed with a
copy of the order or instructions of the court authorizing signing
of the return.
If an employee of the corporation completes Form 1120X, the
paid preparer’s space should remain blank. Anyone who
prepares Form 1120X but does not charge the corporation
should not complete that section. Generally, anyone who is
paid to prepare the return must sign it and fill in the “Paid
Preparer Use Only” area.
See the Instructions for Form 1120 for more information.
Paperwork Reduction Act Notice. We ask for the information
on this form to carry out the Internal Revenue laws of the
United States. You are required to give us the information. We
need it to ensure that you are complying with these laws and to
allow us to figure and collect the right amount of tax.
You are not required to provide the information requested on
a form that is subject to the Paperwork Reduction Act unless
the form displays a valid OMB control number. Books or
records relating to a form or its instructions must be retained as
long as their contents may become material in the
administration of any Internal Revenue law. Generally, tax
returns and return information are confidential, as required by
The time needed to complete and file this form will vary
depending on individual circumstances. The estimated burden
for business taxpayers filing this form is approved under OMB
control number 1545-0123 and is included in the estimates
shown in the instructions for their business income tax return.
If you have comments concerning the accuracy of these time
estimates or suggestions for making this form simpler, we would
be happy to hear from you. You can send us comments from
www.irs.gov/formspubs. Click on “More Information” and then
on “Give us feedback.” Or you can write to the Internal Revenue
Service, Tax Forms and Publications, 1111 Constitution Ave.
NW, IR-6526, Washington, DC 20224. Do not send the tax form
to this address. Instead, see Where To File, earlier.