Since you did not meet the Substantial Presence Test, you are considered as a nonresident filing form 1040-NR. You will be recommended to use Sprintax to complete your filing.
OR,
If you anticipate you will be staying in the US for at least 183 days in the year of 2016, you can make an election to treat yourself as a resident from August 2015, making yourself a dual-alien status.
FirstYearChoice- Residency Starting Date under the First-Year Choice
