I left US along with my wife on 13th June 2019 for good. How can I mention this while filing my tax return. Is there any special category to highlight this fact ?

[xmasbaby0]

No there is no place on your Form 1040 to indicate that you have left the U.S, for good. And you have not mentioned whether you are a U.S. citizen.  It would be helpful for us to know that.  If you were here in the U.S. temporarily then your immigration/visa status might mean you cannot use TurboTax and might need to use a different software program.

NON RESIDENT ALIEN 

If you are a non-resident alien, your return must be filed on Form 1040NR, which cannot be prepared using TurboTax.  You can use TT’s partner, sprintax:

https://www.sprintax.com/non-resident-alien-tax-1040nr-turbotax.html