Possible explanation.
I do estimated payments for CA, as well. But, usually they only ask for three payments; one of which is in January of the following year. So, CA will treat the payment in January as a credit toward your total tax due; but the TT will not treat the January payment as a CA State tax deduction. So the two totals can be different. I suspect the inverted digits is just a coincidence, in your example the $900 difference might be your January payment amount, for example?
