Hi there, I am actually a non-resident alien. I just filed my tax by turbotax. Is that wrong? If yes, how should I fix it?

[pk]

Without further details, cannot comment on whether you are Non-Resident Alien , Dual Status filer or Resident Alien for Tax purposes.  Need your date of admission as F-1 or other visa, the number of days present in the USA ( for any purposes) for the years 2016, 2017 and 2018 ).

Non-resident Alien are required to file form 1040-NR ( not supported by TurboTax-- suggested SprinTax, TurboTax partner or tax professional).

If a 1040 was filed in error,  an amended return using  form 1040-NR must be  mailed  in along with a note explain the error.