> I suppose you could accept payments into a personal bank account and incorporate later, but most tax authorities would frown heavily on that.

In my country many online retailers accept payments on personal bank accounts, but being a total novice to receive payments i have some questions : is there an amount of monthly flow of money where tax authorities start checking your transactions in your bank account? also, how is the process? does your bank notify your government that you are receiving an extra-ordinary amount of money?