It only means you didn’t do your homework(no offense, everyone falls into this trap too and conclude the issue is that estimation itself is not possible ). You can’t give an estimate based on what the task would take at your previous job.
You need to call out what you don’t know(Now, don’t give me Rumsfeld wisdom.. Most software is not that complicated)
You need to call out what you don’t know(Now, don’t give me Rumsfeld wisdom.. Most software is not that complicated)