If you come from a non-EU/EEA country, you will need to apply for a student residence permit. You can find student residence permit advice at www.migri.fi. Remember to arrange all the necessary insurance policies and means of support. 

Start you residence permit application as soon as you have received official confirmation on your admission! 

Check with your new Finnish home university when your first semester begins. You should also apply for student housing. Your Finnish university can advise you on the available student housing options. 

When traveling to Finland, make sure you have all the required documentation with you. Check the latest guidelines regarding the necessary entry documents on the Finnish Border Guard website.” 

Source: https://www.studyinfinland.fi/admissions