I agree with Mimi, it's not too late and we're only halfway through the year. Go back week by week and figure out your income and write it all down and catch up. I bet those parents will be expecting receipts at the end of the year, but I'm surprised they didn't bring it up. Now that I think about it, I'm always the one who tells them that I make up weekly receipts as I'm paid and at the end of the year I give them all out at once. That way I'm not writing out duplicates because I have friends who told me they end up doing that.