why would the tax code field be mandatory on an expense report line

AI generated answer (using internal Slack threads):

The tax code field would be mandatory on an expense report line because it is used to calculate and apply the correct tax rate for the expense. This is important for accurate financial reporting and tax compliance. The tax code assigned to an expense line item can vary depending on factors such as the type of expense, the location where the expense was incurred, and the tax laws applicable to that location. Therefore, even if an item has a default tax code assigned, it may be necessary to specify a different tax code on the expense report line to reflect the actual tax circumstances of the expense. ****** Disclaimer: This response was generated by an artificial intelligence assistant based on previous conversations from multiple Slack channels, and may contain inaccuracies or mistakes. ******