Taxpayer Requested Adjustments to Tax Credits and Incentives

Information Notice 6009
Published: May 2005
Content last reviewed: September 2012
ISBN: 0-7794-8157-7 (PDF), 0-7794-8158-5 (HTML)

Publication Archived

Notice to the reader: Effective January 1, 2009, the Canada Revenue Agency (CRA) administers Ontario's corporate income tax, capital tax, corporate minimum tax, and the special additional tax on life insurers.

As a result, the Corporations Tax Act provisions described on this page and in other publications are only applicable to taxation years ending December 31, 2008 and prior.

For taxation years beginning January 1, 2009, the Taxation Act rules apply.

This publication was archived and kept for historical purposes. Use caution when you refer to it, since it reflects the law in force at the time it was released and may no longer apply.

About this Notice

This notice explains the Ministry of Finance's policy on accepting and processing taxpayer requested adjustments to the following tax credits and incentives:

Tax Credits:

  • Apprenticeship Training Tax Credit
  • Co-operative Education Tax Credit
  • Graduate Transitions Tax Credit
  • Ontario Book Publishing Tax Credit
  • Ontario Business-Research Institute Tax Credit
  • Ontario Computer Animation and Special Effects Tax Credit
  • Ontario Film and Television Tax Credit
  • Ontario Innovation Tax Credit
  • Ontario Interactive Digital Media Tax Credit
  • Ontario Production Services Tax Credit
  • Ontario Sound Recording Tax Credit.


  • Educational Technology Tax Incentive
  • Ontario Current Cost Adjustment
  • Ontario New Technology Tax Incentive Gross-up Deduction
  • Ontario School Bus Safety Tax Incentive
  • Workplace Accessibility Tax Incentive
  • Workplace Child Care Tax Incentive.


Corporations do not have a statutory right to amend a tax return. The Corporations Tax Branch has developed policies to address a variety of situations in which taxpayers request adjustments to tax returns that have been filed.

Generally, it is the branch's policy to process taxpayer requested adjustments received before the expiration of the 180 day period for filing a formal Notice of Objection. This policy permits taxpayers to request an adjustment rather than file a Notice of Objection. Historically it has been the ministry's policy to process a request to amend the Ontario Innovation Tax Credit provided the request was made prior to the expiration of the corporation's normal reassessment period.

These policies have been applied in addressing taxpayer requested adjustments to the incentives and tax credits listed above.

New Policy

The Corporations Tax Branch will now process taxpayer requested adjustments to the incentives and tax credits noted on page 1 when the request is made prior to the expiration of the corporation's normal reassessment period, as defined in subsection 80(10) of the Corporations Tax Act.

Requests for adjustments to these amounts will not be processed if the request is made after the normal reassessment period has ended.

Where the normal reassessment period is about to expire, taxpayers should file a signed waiver noting the specific adjustment requested along with a request for the adjustment.

This policy is applicable only to the specific tax credits and tax incentives listed on page 1. The branch's position on other taxpayer requested adjustments has not changed.

Effective Date

This policy will apply to any of the listed tax credits and incentives claimed in taxation years that are open to assessment or reassessment at the date of issuance of this Information Notice and in all subsequent taxation years.

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