Is this phrase correct?

[Nahuel O Tavros]

"Nereden sabahta geldin?"
Thanks in advance.
Greetings

 

[shafaq]

"Nereden sabahta geldin?"
Thanks in advance.
Greetings

No !
Sabahleyin nereden geldin?
Sabahleyin=in the morning

 

[Nahuel O Tavros]

So the suffix ta iş not usted here.

 

[shafaq]

So the suffix ta iş not usted here.

Also you may say
Sabah sabah nereden geldin?

but this version adds a bit unexpectedness/confusion/astonishment towards the time (morning) of the act. This may be applicable for nearly all "time"s:
like akşam akşam , gece gece , erken erken (early) but not for geç (late/delayed).