Hello! When doing my taxes, I forgot to include a small loss in a stock I invested in in 2022; I invested $35, and lost $1.39. Should I change my return to include that?

Did you realize the loss?  That is did you sell it in 2023?  I would wait and see if the IRS sends you a bill.  They might see the whole sale as a gain and not know you had a loss.  Then you can amend to report it.  But a $1.39 loss shouldn’t affect your return.