I can't answer your questions but you're in for a world of hurt
I remember getting a tax bill equivalent to 90% of my yearly income for this 'transition' year

after some typos made at the municipal tax office
I can imagine you have to fill in the full amounts of interest etc received and that at the end some sort of pro-rata is done according to how many months you spent in CH ?
What are you paying your accountant for anyway if you have to ask questions here on a laymans forum, isn't knowing stuf like this your accountants job ?