How to change year end calendar

AI generated answer (using internal Slack threads):

To change the year-end calendar in NetSuite, you would need to modify the Fiscal Calendar on the Subsidiary page. Please note that changing the fiscal calendar will impact the reports for that subsidiary as they will show the new date as the end of the year. Also, the Retained Earnings will roll based on the new date. If you have mistakenly added an extra month to the year and need to change the posting period into a new tax year, you might be able to edit your transactions into a new temporary date in an existing period. Then, you can edit your dates on the periods, and then edit the dates back. However, this process can be complex and it's recommended to try it in a sandbox environment first. If your company has been acquired and you need to change your accounting periods to match the parent company's, you can modify your accounting periods accordingly. However, changing dates on periods needs to be done in a very particular way or the system might not save the changes. If you encounter any issues, you can use the Multi-Calendar feature to build a new calendar the way you want it and then switch your subsidiary to use the new calendar. Again, it's recommended to test this in a sandbox environment first. ****** Disclaimer: This response was generated by an artificial intelligence assistant based on previous conversations from multiple Slack channels, and may contain inaccuracies or mistakes. ******