Calculator computes cash amount, which polish taxpayers, should subtract from their tax to apply tax-free amount. This value is well-known as tax-decreasing amount.
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This online calculator is currently under heavy development. It may or it may NOT work correctly.
You CAN try to use it. You CAN even get the proper results.
However, please VERIFY all results on your own, as the level of completion of this item is NOT CONFIRMED.
Feel free to send any ideas and comments !