Kolkata has two major Railway Stations, Howrah and Sealdah.
Howra is well linked to other major cities, including Delhi (1450 km), Mumbai (1970 km), Chennai (1660 km) etc. Dakshineswar is 15-20 km from Howrah. The most convenient way is to take a pre-paid taxi from outside Howrah station and ask for Sharada math in Dakshineswar (about Rs 200/-) YSS ashram is about 200 metres from the Sharada Math.
A cheaper alternative is to take the local train to Uttarpara and cross the Hoogly by ferry. The ashram is about 10 minutes walk from the ghat.
Saeldah is the terminus for some trains from the North, the North East and Suburban local trains. Dakshineswar is about 14 km on the Sealdah- Dankuni line. The ashram is about 1 km from the Dakshineswar railway station. Cycle rickshaws/three wheelers are freely available.
Metro Station nearby is Shymbazar.
The Netaji Subhash Chandra Bose Airport at DumDum connects Kolkata to several cities in India and abroad. Dakshineswar is about 15 km away. Pre paid taxis are available for about Rs 200/-. Please ask for Yogoda in Ariadaha near Sharada Math in Dakshineswar.