Why can I not edit Bill Credits from a month that is closed

AI generated answer (using internal Slack threads):

In NetSuite, once a period is closed, you are not allowed to edit or void transactions such as Bill Credits that fall within that period. This is to maintain the integrity of the financial data for that period. The "Allow non-GL changes" checkbox allows for certain non-GL changes to be made to transactions in a closed period, but it does not permit the editing or voiding of transactions. However, if a Bill Credit from a closed period is not applied to a bill, you can still apply it to a bill in an open period. This is because applying a Bill Credit does not change the Bill Credit itself, but rather the bill to which it is applied. If you need to void a Bill Credit in a closed period, you would typically need to create a manual Journal Entry to reverse the effect of the Bill Credit. However, this should be done with caution and proper understanding of the financial implications. Remember, these actions should be performed in accordance with your company's accounting policies and procedures. ****** Disclaimer: This response was generated by an artificial intelligence assistant based on previous conversations from multiple Slack channels, and may contain inaccuracies or mistakes. ******