The offical currency in Estonia is EUR (euro) so if you are coming fro outside the EU you will need a currency exchange to get some local cash. The address of this currency exchange ise Aia street 5
Mon-Fri 9:00 – 19:00
Sat 9:00 – 17:00
NIGHT EXCHANGE OPEN 24H !!!
Click on the link for more information about this Tallinn currency exchange