The Swedish Transport Administration will be working on the tracks south of central Stockholm from 12 May to 16 May, inclusive. This means some trains will not stop at Stockholm Central as usual.
What does this mean for me?
Depending on your journey, your train will depart from/arrive at Stockholm Södra.
If you wish to travel to/from Stockholm Central you will need to travel by SL commuter train for a part of your journey. You can purchase the commuter train ticket while buying your journey here on sj.se.