If I understand your question correctly, you are just wondering when, for financial projections, your startup period ends and your first year in business begins.
To some extent, the distinction is arbitrary. You could just as easily create your financial statements without labeling them at all. (Note that the definitions of how costs are dealt with for tax purposes may vary - see an expert.)
I would think that you could safely call your first 7 months your startup period, and just start Business Year One the next month, but as long as the numbers work it shouldn`t matter too much.
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