The article considers the significance of volitivity in the setting up of tax subjectivity (personality) in terms offactual (resp. substantial) taxpayer – the one upon whom the tax obligation rests. The author specifies four methodsof identifying the tax personality – incl. objectivistic, behavioral, equitable, and subjective – in order to outlinethe field of analysis. In case that the object of taxation includes factual and, in particular, economic events orconditions, the will of the subject participating therein as a taxpayer/taxable person (or otherwise) may be, andindeed proves to be, of essential significance. The author argues that the subject who is willing to become a taxpayer/taxable person becomes such a subject even when acting under an error-of-law (phantom taxpayer) or whenacting in bad faith if participating in an event (condition) that objectively is not subject to taxation and yet (s)he/it has submitted the related tax return – unless such subject has quit or lost this status under jurisdiction proceedings.In case that a subject has unconsciously participated as a taxpayer in a third-party tax fraud, whilst (s)he/itshould otherwise have been aware of it, (s)he/it may not be a taxpayer/taxable person anymore, which howevermay only be established through jurisdiction proceedings. To conclude, if a subject is willing to be a factual (substantial)taxpayer, (s)he/it becomes a taxpayer (taxable person) even if (s)he/it has submitted a tax return thatspecifies, in particular, the tax obligation related to events (conditions) not subject to taxation