Your are *LATE* for 3 quarters. Period. End of story. So get it all "caught up" with the 3rd quarter payment and you will stop the accumulation of late fees, fines and penalties. PAY IT YESTERDAY if not sooner.
4th quarter is not due for 6 weeks. There is no way on this green earth that you can *know* what your 4th quarter earnings will be so that you can pay now, and "know" that you have covered your 4th quarter taxes without grossly overpaying and possibly leaving yourself short. This is not anything like paying your mortgage payment 6 months in advance. In fact, it has no relation to something like that.
Now if you want to waste time sending in separate 1st, 2nd and 3rd quarter payments, go ahead. But you *really* need to quit asking questions and pay. The more you chat, the more your late fees and interest accumulate.
The fastest way to do this so as to get it paid today without having to wait for the IRS to get it in the mail and process it, is online at www.irs.gov/payments. Make *SURE* you read *all* information on each screen so that your payment is applied to the correct tax year and the correct tax quarter. If you apply it wrong, you can *NOT* undo it without going through one hell of a rigamarole on the phone with the IRS (that is, if you can actually get a human on the phone whose primary language is English.)
