@yashK , based on your post you are a Non-Resident Alien for the year 2019 --I am assuming here that you came into the country on F-1 in 2015 ( please confirm this )-- therefore you would be exempt from counting days present till the end of the calendar year 2019. The H-1B adjust of status starts your days present counting from the day of adjustment of status. Thus you would still not have met the substantial presence test till sometime in Feb/March of 2020. As NRA , you are taxed by the USA ONLY on your USA sourced / connected income. Your Indian income is immune from US taxation till you pass the substantial presence test in 2020.
Does this help?
Namaste ji
