Here at Medina Company, our motto has always been to keep things simple (stupid!). Honestly, we’ve actually tried, used and played with all of these methods. And we'll try them again, in the hopes that they get easier. But until that day, we’re not the biggest fan. The simple act of writing a check, putting a stamp on an envelope, and putting it in a mailbox is still pretty simple.
Most taxing authorities won’t simply accept the banking “bill-pay” that a lot of banks offer – and some banks won't LET you sign up to pay taxes online through their bill-pay system. You still need to include a lot more information (which is what's included on the paper voucher we give you when using the mail) when making online payments, which is why every authority has come up with their own method. You often need to specify your Taxpayer number, what period it pertains to - this information doesn't show up when you use your bank's online bill pay feature.

If you’re determined anyway to try all this stuff from your PC or Phone (Paul tries to do nearly everything there), then here’s where to go.
_____________________________________________________________________________FEDERAL – INDIVIDUAL - www.irs.gov.payments/
You can pay 2017 taxes owed, extension payments, 2018 estimates, or even payments for a payment plan or respond to a tax notice (which you called us and we helped you understand before you just paid it, right?)
You can choose your payment method:
Direct Pay – Just type in your checking account details and make a payment. It’s free!
OR
Debit/Credit Card – The IRS uses outside payment processors, who offer different payment structures and fees.
A debit card transaction is typically a flat fee, for somewhere between $2-$4. Using your credit card, a percentage fee ranging 1.8 - 2% will be charged to process your payment. If you use a debit card, a flat fee, ranging between $2-$4 will be charged.
_____________________________________________________________________________KENTUCKY – https://epayment.ky.gov/EPAY
You can pay 2017 taxes owed, extension payments, 2018 estimates, your Limited Liability Taxes (That pesky $175!) or even payments for a payment plan or respond to a tax notice.
Electronic Check/ACH – Just type in your checking account details and make a payment. It’s free!
OR
Debit/Credit Card – To use a Debit card is a 1.5% fee. To use a credit card is 2.75%. However, you can’t use a card to pay estimates, only remaining taxes owed.
_____________________________________________________________________________LOUISVILLE – www.officialpayments.com (jurisdiction code 2702)
E-Check – costs $2.50
Debit Card – 1%
Credit Card – 2.8%
This website doesn't strike us as very clear. It doesn't appear to have you specify which year your payment refers to, but perhaps it gets addressed later in the process. If someone tries this, please let us know!
_____________________________________________________________________________IINDIANA - https://dorpay.dor.in.gov/
You can pay individual estimates, extensions, and remaining amounts due.

As is typical, Debit/Credit cards charge a processing fee (we can’t find out how much)Electronic Check or ACH draft does not charge a fee.