You can turn on Response Limits to automatically close your survey once a certain number of respondents have taken the survey through the collector. This was previously called the Maximum Response Count.
If you have multiple collectors, you need to turn on Response Limits for each one separately in order to fully close the survey. To set a survey-wide limit, we suggest using only one collector for your survey.
To turn on Response Limits:
You may receive one or a couple responses over the maximum because any respondent in the process of taking the survey when the maximum is reached is still able to submit it.
For example, let's say the maximum is set as 100 and you already have 99 responses recorded. If two people access the survey simultaneously, the first person to finish is the 100th respondent. The other respondent will still be able to complete the survey, which means the survey will collect a total of 101 responses.