Yes, you will be considered a resident of the US for 2018 (if you have been in the US for most of 2018). You can file a resident 1040 return with TurboTax.
If you arrived in the US in August 2013, 2013 counts as one of your five years (including part years) with a F-1 visa (2013, 2014,2015, 2016, 2017). As of January 1, 2018 you would need to start to count days of presence in the US to see when you meet the substantial presence test.
You will be
considered a United States resident for tax purposes if you meet the substantial presence test for the calendar
year. To meet this test, you must be physically present in the United States
(U.S.) on at least:
- 31 days during the current
year, and
- 183 days during the 3-year
period that includes the current year and the 2 years immediately before
that, counting:
- All the days you were present
in the current year, and
- 1/3 of the days you were
present in the first year before the current year, and
- 1/6 of the days you were
present in the second year before the current year.
As you will meet the substantial presence test in 2018, your residency starting date is January 1, 2018.
