If I buy FM2020 from voidu.com (the direct link from FMscout) will I be able to buy the editor from steam and apply it there?

If I buy FM2020 from voidu.com (the direct link from FMscout) will I be able to buy the editor from steam and apply it there?

It makes no difference where you buy FM20 from. As long as it's coming from an authorized Sega partner (and we only team up with such retailers), the Steam key you receive will add the game in your library. After that, there's no difference compared to if you'd buy the game directly from Steam store.