The question was how to cancel the $25 done with my credit card to pay for a state efile.
Technical support at Intuit had no answer - hence the reason for this question.
Intuit support advice was to dispute the transaction at the card issuing bank
P.S. thanks for the response though. The return was already printed and mailed before the magic "0" trick was revealed.
BTW - it is up to Intuit to inform us about the magic "0" and it is odd that the support was not aware of it.
