How to bring past survey answers into future survey

This depends on how you build your reports. You should be able to select former surveys to retrieve the response data in your visualizations.

LolaNewbie assuming you are using different surveys from one month to the next you will have to used Advanced Reports to connect the projects. Here is a support page you will find helpful in telling how to do that.
https://www.qualtrics.com/support/survey-platform/reports-module/reports-section/reports-visualizations/multiple-data-sources-in-advanced-reports/

https://www.qualtrics.com/community/discussion/comment/34147#Comment_34147It will be the same survey for every month

LolaNewbie then you want to follow this article
Results-Reports Breakouts

https://www.qualtrics.com/community/discussion/comment/34156#Comment_34156thanks! So I ended up creating a ticketing process with an approval/deny process in which when a survey is received there would be a retake link (using the Response IDs, which requires rebuilding the retake link) and then embedded the links into the emails when the reports are submitted and approved. Providers will be able to update their precious survey submissions with the data submitted from the prior month and the current reporting month without having to re-enter all that information all over again. Hope this makes sense!