I did my taxes through turbo tax. I got a refund from the state of WI but owe $8.00 to the Federal. Where do I locate the payment slip in turbo tax?

The 1040-V is in your forms. However, I would recommend paying online here.

See How to Print your online return to print the 1040-V, if desired.

Click on Forms view in the upper right. Click on Open Form (at top of the list of the forms in your return). Type in Payment Voucher. Click the voucher for your Federal return 1040-V.  Or you can have the payment due direct debited from your bank account. Go to your 1040 where it shows the amount due. It should give you the option of entering your bank routing # and acct #.

@zchurchy93  Thanks but once a return has been filed, you can't go back and enter payment information.

Sometimes you can see in Community if a user is using online or desktop.