Are you sure they can't add the $30 charge later? I paid through Paypal before being told I wouldn't be able to file my PA return.
It's not clear whether "file by 2/28" would count choosing "file by mail" on 2/28 as "filing by" 2/28. I could e-file my federal and file the state by mail, in which case I'd have to go back and change my payment for state to "pay by check."
