Online Business Requirements

Hey everyone. I'm  currently based in Bulgaria as Im a university student here. (Not sure if this is the correct category to post this.)
Im interested in creating an e-shop and doing business through dropshipping, buying products from abroad and selling them abroad as well (not in BG). Though the base will be here, as I live in Bulgaria, and I would like to know if I should get a permission to create this e-shop and how do i deal with taxes here?
Thank you in advance!

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