In the Reports there is a report set up to show what value is in the nominals for those periods and what is the breakdown of the postings.
Follow the below steps to produce the report:
From the Main Menu select Advance Report Execution.
Select the VAT or VAT-Cash Accounting folder.
In that folder should be a report called VAT Journals to Post.
Select the 3 periods for your VAT quarter required and if you want to see all the postings untick the Suppress Detail Lines.
Select ACCEPT.