My Employer want to covert oscommerce to magento .Which version should I go ?
How to convert a magento 1.x site to magento 2.x
I suggest to choose magento 2, the highest version of magento. It is not doubt that Magento supports e-merchants to develop online business as well as satisfy customers' behavior. You can read many articles that compared between magento 1 and magento, oscommerce and magento to make a decision.
Magento 2.1 is the last suitable version of Magento. However, I suggest you choose Magento 1.9. It seems to be lighter. At this time, you can move data from oscommerce to magento 1.9.