A woman involved with a so-called “tax protestor” scheme has received an 18-month conditional sentence after admitting to tax fraud, the Canada Revenue Agency (CRA) announced on Friday.

Christine Bieri of Longueuil, Que. pled guilty to tax fraud charges before the Court of Quebec after a CRA investigation found that she counselled 13 taxpayers to try and reduce or eliminate their income taxes by claiming improper expense deductions, a CRA notice states.

Bieri “acted as a facilitator” for the promoter of a tax protester scheme, Christian Lachapelle, the CRA document adds. Lachapelle was sentenced to four years in prison after pleading guilty to tax fraud charges in November 2015.

In that case, a CRA investigation found that Lachapelle advised 93 taxpayers to try to avoid paying almost $2 million in income taxes using the popular tax protestor argument that there is a distinction between a “natural” person and a “legal” person. Canadian courts have repeatedly rejected these arguments, the CRA notes.

In Bieri’s case, the CRA says that she advised 13 individuals to try to avoid paying more than $120,000 in taxes. She received an 18-month conditional sentence.

The CRA warns that taxpayers who try to avoid paying taxes based on tax protester schemes will be reassessed as well as face additional interest charges and monetary penalties.