How to change TRN in invoice template? I change in Account and setting. And also tried to changed in Custom form style but in custom form style threre in no area for TRN

Changing TRN in Account and settings is actually the right place because it is tied to your company info, not the invoice template itself. In order to have a dedicated field for TRN in your invoice templates, it would require using a custom field.

Just go to Settings ⚙ > Custom fields > Add field. Name it TRN, and select Number under Data type. Choose Transaction, then Invoice. Ensure you toggle Print on form, then Save.

Here's the link for more information regarding this matter: Create custom field

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