From the year 2012 The National Academy of Sciences, India (NASI) is publishing its Journals in association with the Springer India Pvt. Ltd. and the manuscripts for all the Journals are being processed/uploaded only through the following websites :
Proceedings of The National Academy of Sciences, India-Section A (Physical Sciences) : www.editorialmanager.com/nasa
Proceedings of The National Academy of Sciences, India-Section B (Biological Sciences) : www.editorialmanager.com/nasb
National Academy Science Letters : www.editorialmanager.com/scle
Please go through the above mentioned webpages and follow the instructions for online submission of the manuscripts.