Your S-Corp made a distribution to you. On the books of the S-Corp it's recorded as a reduction of cash and a reduction of your capital account. That will flow through the Schedule K-1 to you.
On your books you account for the cash paid to the IRS as a payment of estimated taxes and a reduction of your basis in the S-Corp.
In your income taxes you'll simply report that payment as a regularly-scheduled estimated tax payments, as that's all it was.
Tom Young
