If you requested to pay the taxes owed with a check or money order using a payment voucher to be mailed with your payment, the voucher will be included in the download of your tax return.
When you sign onto your online account and land on the Tax Home web page, scroll down and click on Add a state. See screenshot
This will take you back to the 2018 online tax return.
So you owe tax due and want to mail a check or money order with the 1040V voucher? Print out your tax return and the voucher will print out with it. Or pay directly on the IRS web site.
PRINT RETURN You need to print a copy of your return? Sign in to your account using exactly the same account and user ID that you used to prepare your return.
On the bottom of the screen find Your tax returns & documents and click on Show. Click on the Year and Click on Download/print return (PDF)