Does $142.00 balance due mean I still owe?

Yes--if your tax return shows a balance due that means you need to pay that amount.  You have not mentioned if the amount is due for your federal return or your state return.  

If it is for your federal return it is shown on line 78 of your Form 1040.  You can pay by mailing in a check or money order with your 1040V when you mail in your tax return, or you can pay directly on the IRS site:

https://www.irs.gov/payments/direct-pay

If the amount owed is for your state, most states want you to pay by using their own tax website or by mailing in a check or money order.

Where are you seeing that?  If you mean you are seeing that on your TT account and you already filed and paid your tax due when your tax return was filed, TT is always going to show that you owed.  TT never knows if, how or when you paid a tax due, and will always just display the results of the tax return you prepared using the software.