Why would the "refund to you" amount on 2018 -1040 line 20 ($9098) be $6 less than the overpaid amount on line 19 ($9104)?

[RnStL]

Using Turbo-Tax Premier pc software, 2018.

[SharonC1]

Is there anything on line 23?

[RnStL]

yes, thanks for pointing that out, it is also $6 (as a tax penalty), which i'll have to figure why, since i overpaid estimated tax payments.

[SharonC1 · Accepted solution]

I would take a look at line 23 of your IRS 1040.  It sounds like it might be a penalty.  

If you find it is a penalty, take a look at IRS Form 2210 to understand why you were penalized.

[SharonC1]

The 2210 is not available on TurboTax yet.  Right now, the estimate is tomorrow but you can watch the link below for updates.  <a rel="nofollow" target="_blank" href="https://care-cdn.prodsupportsite.a.intuit.com/forms-availability/turbotax_fed_windows_individual.htm...>