The new auto tax came into force on Friday and the official calculator is now operational after several days in which various unofficial online calculators listed different tax values for identical cars, 0-100.hotnews.ro informs. The main novelty that the auto tax legislation brings in 2012 is the fact that the tax will be paid for all cars whose buyers paid no taxes when their property rights were first registered. Most affected by the new tax are those that want to sell or buy a 7-10 year-old Euro 3 car because the tax is twice higher than that for a 5-7 year-old car with an identical engine that nevertheless conforms to Euro 4 regulations. The public calculator is also useful for those that have paid the tax since its introduction in 2007 and that want to ask to be reimbursed the difference between the old and the new variants. Another extremely useful feature is the fact that those that want to be reimbursed can introduce in the calculator the age that their cars had at the moment of their registration, Gheorghe Popescu, head of the Environment Fund Administration (AFM), stated for hotnews.ro.