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AI generated answer (using internal Slack threads):

Based on the information extracted from the Slack threads, it appears that the tax rate field in the invoice form in NetSuite is not directly editable. The tax rate is determined by the tax code that is applied. Therefore, to change the tax rate, you would need to change the tax code. In addition, the visibility of tax fields in the invoice form can be dependent on Nexus. If the checkbox to show these fields is greyed out, it could be due to the Nexus settings. As for creating an inline text field in a transaction form, it is possible but the field would be disabled if there is no script written on that field. ****** Disclaimer: This response was generated by an artificial intelligence assistant based on previous conversations from multiple Slack channels, and may contain inaccuracies or mistakes. ******