In Argentina, capital gains tax is computed similarly to your income tax. If you're considering a corporation, the tax rate is around 35%, and for individuals, the calculation method might differ (exact details may vary).
It's worth noting that having a DNI (Documento Nacional de Identidad) doesn't necessarily affect your tax obligations. If you've been in Argentina for more than 6 months, with absences totaling less than 90 days in the last 12 months, you're required to pay taxes on all income sourced within Argentina. Permanent status with a DNI may introduce different tax considerations.
Regarding personal property, there might not be a specific tax on the sale, but this could depend on the type of property being sold.
Keep in mind that tax laws are subject to change, and it's advisable to consult with a tax professional for the most accurate and up-to-date information.