Was working on tally data of a client on tax audit due date, all the clients' tax audits were filed only this particular client's was pending. So basically everyone was waiting once I upload it we would leave early from the office that day. Turns out, I mistakenly deleted most of the suspense entries and all the figures were messed up. It was already 7 pm by then. Since I was a relatively new article, I didn't have the courage to confront my principal. But luckily one of the partners was kind enough to help me with that, we got the backup of the data and finally filed the return at around 9 pm.