How do I make corrections to my account?
For corrections regarding any financial, account related or administrative information, please phone, fax or write us.
Phone: 1 866 ONT-TAXS (1 866 668-8297)
Fax: 1 866 888-3850
Teletypewriter (TTY): 1 800 263-7776
Write:
Ministry of Finance
33 King Street West
Oshawa ON L1H 8H5
