Once you have passed the five calendar year from the year of original admission e.g if you were admitted in in 2013 then 2018 is the first year you would start counting days present and thus it is possible that 2018 you would be a resident alien for the year. So in such a case though 2017 ( if you had US sourced income ) you would file form 1040-NR and 2018 would be the first year you would need to file form 1040 ( supported by TurboTax).
So when did you enter the country? Are you on OPT? What is the source of your income? Did you file form 1040 or 1040-NR in 2017 ?
Namaste ji
