I highly recommend to all my clients to use electronic payment methods for taxes. For those that are scared that for some reason the IRS or other tax authorities will seize their account I remind them that the routing number and account number are on checks which is all the info needed. People can pay by money orders or bank checks (cashiers, etc ) but if they get lost in the mail and if receipt is lost or misplaced, trying to prove payment may be impossible as well as trying to get money back if check is never cashed.
every tax authority that allows electronic payment also allows printing of receipt with unique identifying number to trace if needed but you do need to save it as needed. many of these sites will also allow you to look up these payments, cancel before payment date and perform other activities. even extension payments can be made this way
