R1213:EMEA VAT Register is not a AP invoice

Hi Guru's.

Need your help to understand the selection process for AP VAT Reporting (EMEA - Italy), we have tax calendar of Monthly, we have an AP Invoice with Invoice date as 30-SEP-19 where as in distribution we have GL date as 03-OCT-2019 for an Item and Tax lines, when we run the VAT Reporting process this Invoice is selecting for OCT-19 instead of Sep-19, hope the TAX selection process based on Invoice date basis ?

Thanks,

Sekhar.