Property Sale Tax

I am a Polish citizen but have been living overseas permanently for a few decades.

I had my mother's apartment/flat gifted to me just prior to her passing away. I sold the property 5 years after the date it was gifted, but apparently it has to be 5 years after the new calendar year after the gift to be so there's no capital gains tax due, is this correct?

Let's say the property was sold for 500k. Does this mean I have to pay 19% capital gains tax based the value increase from zero to 500k, meaning I have to pay 95k in tax?

Where overseas exactly, stokrotka? Rules may vary, especially on tax related issues.

I was reading some documents in Polish about that and it's all screwed up. It depends on many variables. Why don't they make it easy for the people. You're right about 5 years after the new calendar year (why do they mention 5 years then - it's virtually ALWAYS more than 5 years).