Tax Allocation Process is not populating a specific AP invoice for period into je_zz_vat_rep_trx_t

Summary:

Tax Allocation Process is not populating all AP invoices for period into je_zz_vat_rep_trx_t

For the specific Payables Invoices transaction in question

The invoice  does have an older "invoice date" (2021)    but does have a creation date and GL date in the required period (Jul-25) which is the period I am running the process.

How do I establish what is excluding this transaction?

note the invoice did not appear on the Exceptions report

I am sorry, I do not have a tax config background.

Is the invoice date causing the issue? if so how would I identify this?