ON100 Notice of Objection - Ontario Corporations Tax Act

This form is used to file an objection to a Notice of Assessment or a Notice of Determination issued under the Ontario Corporations Tax Act, except for premium taxes.

Ways to get the form

• Download and fill out with Acrobat Reader

  You must download and open fillable PDFs in Acrobat Reader 10 or higher.

  • Accessible Fillable PDF (on100-fill-23e.pdf)

• Print and fill out by hand

  • Standard print PDF (on100-23e.pdf)

• Ask for an alternate format

  You can order alternate formats such as digital audio, electronic text, braille, and large print.

  • Order alternate formats for persons with disabilities