A: No. The tax involved was not any sort of income-tax; it was the temple-tax, a small token-tax dedicated to be used for the upkeep of the temple and its environs. (It was based on the bekah-tax mentioned in the records of Ithamar in Exodus 38:25-26). One coin -- to be specific, a silver tetradrachma -- would be exactly what was required to pay the temple-tax for two individuals such as Jesus and Peter.
An objection may still be made that Peter would have to be awfully lucky to find just the right coin in the mouth of the first fish he caught that day. In order to know that a particular fish that had swallowed a particular kind of coin would be in a particular place where Peter could go fish, Jesus would need supernatural knowledge. But of course the premise that Jesus possessed and used supernatural knowledge is accepted by Bible-believing Christians, as it was by the author himself, who records this incident as an example of that very thing.
Yours in Christ,
Waterrock


