Hi @Adrox465 , I would advise you to contact a tax advisor so they can better answer your questions regarding this as unfortunately, Udemy is not able to provide you with tax advice.
Hello Maciej, I know it has been some time, but have you had a chance to learn how those forms should be filled? I also have a sole proprietorship in Poland and I too am confused about how to fill the Udemy forms.
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