Self employed in Norway?

Hi all. I'm Japanese living in Oslo and currently on a working holiday until January 2017. I'm planning to apply for a self-employed visa for next year before my visa will be expired. I read through it https://www.udi.no/en/checklists-contai … way/?c=jpn but now I have some questions regarding that.

The company will be newly established, (I'm a graphic designer, translator, writer, coordinator and exporting fashion items to Japan) I understand that I have to proof the gross income that will be at least NOK 235 258 per year and the budget for my business but how can I show and how much budget do I need to meet the requirements?

Thank you in advance!

I think you have to provide like a tax declaration shows that you have earned this amount and you paid the tax!