--------------------------------------------------------------------------------

                                 UNITED STATES

                       SECURITIES AND EXCHANGE COMMISSION

                            Washington, D.C.  20549

                          ___________________________


                                    FORM 8-K

                                 CURRENT REPORT
     Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934



    Date of Report:  (Date of earliest event reported):  September 13, 2010


                               Rock-Tenn Company
               (Exact name of registrant as specified in charter)


           Georgia                 001-12613                62-0342590
(State or Other Jurisdiction   (Commission File           (IRS Employer
      of Incorporation)             Number)             Identification No.)


     504 Thrasher Street, Norcross, Georgia              30071
    (Address of principal executive offices)          (Zip Code)


                                 (770) 448-2193
              (Registrant's telephone number, including area code)

Check the appropriate box below if the Form 8-K filing is intended to
simultaneously satisfy the filing obligation of the registrant under any of the
following provisions:

[ ] Written communications pursuant to Rule 425 under the Securities Act (17 CFR
    230.425)
[ ] Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR
    240.14a-12)
[ ] Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange
    Act (17 CFR 240.14d-2(b))
[ ] Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange
    Act (17 CFR 240.13e-4(c))


--------------------------------------------------------------------------------


Item 8.01.  Other Events

In  April  2010, Rock-Tenn Company ("we" or "our") filed an application with the
Internal  Revenue  Service  ("IRS") to be registered as a producer of cellulosic
biofuel  as  described  in  Internal  Revenue Code Section 40(b)(6).  On July 9,
2010,  the IRS Office of Chief Counsel issued Chief Counsel Advice Memorandum AM
2010-002  dated June 28, 2010, which concluded that black liquor sold or used in
a  taxpayer's  trade  or  business  during calendar year 2009, qualifies for the
cellulosic biofuel producer credit ("CBPC").  On August 19, 2010, the IRS sent a
Letter  of  Registration to our wholly-owned subsidiary, Rock-Tenn Mill Company,
LLC ("RockTenn"), approving RockTenn as a producer of cellulosic biofuel through
the  operation of its pulp and paper mill in Demopolis, Alabama.  Each gallon of
black  liquor  produced  by  a  registered  cellulosic  biofuel  producer during
calendar  year 2009 qualifies for a non-refundable CBPC of $1.01 per gallon. The
CBPC  is  a  taxable  credit  which  results  in  an  after-tax  credit value of
approximately  $0.63  cents  per  gallon.  We  have  calculated  the  aggregate
undiscounted  CBPC,  net  of  expected  income  taxes  and  interest,  to  be
approximately  $113  million.  Any CBPC unused in any particular tax year may be
carried  back  one  year  and  carried  forward  and  utilized  in future years.
Although  the  statute  is  unclear  as  to  the expiration date of these credit
carryforwards,  it  will  be  no  earlier  than  December  31,  2012.

For  the  majority  of  calendar  year 2009, RockTenn had qualified to receive a
different  tax credit linked to the production of black liquor - the alternative
fuel  mixture credit ("AFMC") of $0.50 per gallon. The AFMC is not includable in
taxable  income.  We  have  calculated  the  aggregate  AFMC  generated  to  be
approximately  $84  million.

Since  the after tax value of the CBPC credit is of greater value to us than the
AFMC  credit  that  we had previously claimed, we have amended our 2008 and 2009
federal  returns  and will file our fiscal 2010, 2011 and 2012 federal and state
tax returns claiming the CPBC. The estimated cumulative impact of this change is
that  we anticipate an increase in the after tax cash benefit of using CBPC, net
of interest, over using AFMC to be approximately $29 million. We will record the
cumulative  impact of the increased tax credits in our September 2010 quarter as
a  reduction  of  income  tax  expense.

The AFMC can reduce a taxpayer's federal income tax liability to zero in a given
tax year and any unused amounts can be refunded to the taxpayer. The CBPC can be
used  to  reduce  federal  income  tax  liability in a given tax year but cannot
reduce  a  taxpayer's  federal tax liability to less than 25% of such liability,
calculated  before  the  application  of  CBPCs. The net impact of changing from
using  AFMC  to using CBPC is that we will pay approximately $50 million more in
taxes  and  related  interest  than  we had assumed we would pay for the quarter
ended  September  30, 2010 as we return the cash associated with the AFMC to the
IRS,  and we receive the benefit of approximately $31 million of CBPC for fiscal
2009  and  fiscal 2010. We expect to reduce net cash tax payments in fiscal 2011
that otherwise would be payable without the benefit of the CBPC by approximately
$50  million, plus receive an addtitional refund of approximately $3 million due
to  a  carryback  to  fiscal 2008. We expect an additional reduction of cash tax
payments  in  fiscal 2012 through the use of the estimated remaining $29 million
of  CBPC  not  utilized through the end of fiscal 2011. The actual timing of the
utilization  of  the  CBPC  will  vary  due  to  changes  in  taxable  income.

On  our  third quarter of fiscal 2010 conference call we stated that we expected
there  to  be  some  modest  upside  to  our  last  estimate of fiscal 2010 debt
reduction  and  dividend  payments  of $285 to $290 million.  Our prior guidance
will  be reduced by the $50 million of additional tax payments outlined above.

                                       2


SIGNATURES


Pursuant  to  the  requirements  of  the  Securities  Exchange  Act of 1934, the
Registrant  has  duly  caused  this  report  to  be  signed on its behalf by the
undersigned  hereunto  duly  authorized.


                                                ROCK-TENN COMPANY
                                                  (Registrant)




Date: September 13, 2010           By: /s/ Steven C. Voorhees
                                       -----------------------------------------
                                       Steven C. Voorhees
                                       Executive Vice-President, Chief Financial
                                       Officer And Chief Administrative Officer
                                       (Principal Financial Officer)

                                       3