How to default the Tax Section to be expanded?

Summary: We need to know how the Tax Section of Invoice can be opened/expanded by default. Either by customizing the page or other way to achieve it.

Content (please ensure you mask any confidential information):

Currently, our client is having an approval rules where it was using the Invoice Requester at Invoice Line Level as a condition. If there is a requester in invoice line (Invoice matched to PO), an approval will be triggered. Otherwise, it will be automatically approved.

However, they noticed that large number of invoices is automatically approved instead of going for an approval.

Upon investigation, we noticed that when the end user create an invoice and matched to PO, the requester from PO was not copied to Invoice Line. This is only happening when the user is opening/expanding the Tax Section of the invoice.