also, don't listen to some very rude players, there are some even I asked the same question like you did, I should not have to apologize. Xon seems good, at least he is not rude like others did.
im not sure, unless you only just started. it might either take two weeks or you have to be premium player, either way, I don't know. I haven't touched mine for like 6 weeks or something, I only recently changed profit transfer to 60% today.
Honestly, profit transfer is best at 81%. It's not a total charge of all products sold, but rather cash transfer from PROFIT. Meaning: Cost of post-month products+a little something, salaries, taxes, and all that other stuff taken out.
It depends on how valuable you want the corporation to be. If it is undervalued and you want to IPO you can speed it up by reducing the profit transfer. Also, rather than a profit transfer a lot of CEOs find it desirable to just set cash levels in the corporations. I think it increases the value of the corps, but other than that I don't see any real reason to do it that way.