My h1b began in October 2015. I quit my job this july and filed for change from h1b to f1. Approximate processing time is 8 months, so I will have my f1 status sometime around April 2018.

After completing my masters, I will go back to h1b again. If so, how much time will I have remaining on my h1b before I have to apply for an extension? Will it be 6 months or 3 years?