Когда with "о" as Sonia correctly noted. In "ты будешь" you need "ь"(мягкий знак, between "т" and "б"), not "ъ", твёрдый знак. The rest is alright except for a little typo in the last "дома". Also comma is dot+Shift and question mark is 7+Shift.

кОгда ты будешЬ дома? кОгда он будет дома? кОгда она будет дома? кОгда вы будете дома ? кОгда мы будем дОма ?

dot and comma are on the same key were they have '/' '?' on American keyboard. the key closest to right <shift>.

кOгда