Hi, I’m working on a data entry project for the last few days but after working 2-3 hours, I realized that I’ve horribly miscalculated the time it’d take me to complete the project. At first, I thought it can be done in 9 hours, but after working on it for 2-3 hours, I’ve realized that it’ll take the double amount of time.
I know that it’s totally my fault, should’ve given more thought in calculating the time. But I’ve messed up big time now. What do I do? How do I ask the buyer politely that I’ve messed up and need extra time + money? Can I do that and still look professional? Although it was so not-so-professional mistake