If a return is not filed after the computer-generated letters, such as TX11 and TX14, a non-filer officer could arbitrarily prepare a tax return for the taxpayer, normally generating a larger tax bill than what the taxpayer would expect. A notice of assessment under subsection 152(7) of the "Income Tax Act" will be issued. This 152(7) assessment is commonly known as an arbitrary assessment. Collection actions may follow. The taxpayer could file an amended tax return to reduce the tax bill. Once amended returns are filed, an audit is normally triggered.