Hard question. It doesn't give us any information on that but this is a parable so they don't really exist.
It would be nice to have added and tax collector refunded all the money he tricked people out of as he moved by the Holy Spirit.
I like to think other people would be like Wow you have changed and he would be like yes I am a new person.
Other people could answer this question better than me. I haven't gotten that far yet.
Question about this parable, do you think the tax collector ever knew he was saved? Obviously the Pharisee "knew" he was saved, but do you think the tax collector ever knew or felt redeemed or do you think that is not a teaching to read into this parable?