Relocation to Finland from Sweden.

Hi, I’m a developer currently working in Stockholm at an IT company. I’ve received an offer from my employer to relocate to Finland office (long term transfer). Here’s my situation: I own an apartment in Stockholm, we’re a family with kids (not yet in school), and we have some savings in the bank. We obtained Swedish citizenship a few years ago, so relocating to another country should be relatively straightforward. However, I assume there are several administrative tasks to take care of, such as managing BankID, pension, what about the apartment (should we sell or rent out) etc.

Dear members of this group, could you please share advice on what I should keep in mind? Unfortunately, my employer can’t provide much guidance as we are a small company.