One thing that I wish I had known before filing my taxes for 2021 was that I should have rolled over the small 401k disbursement from my previous employer into another plan.  It wasn't until I received my 1099R form and applied it to my tax profile that I got hit with taxes and an early withdrawal for not rolling it over.  I am assuming that there is nothing I can do to reverse this.  It just sucks because it was just $70.