Is this topic here and this topic - Concept BTW rapport (Dutch VAT report)
relevant to us lesser mortals who don’t have advanced accounting skills 
?
I only do VAT Returns every quarter using the VAT Calculation Worksheets. I don’t use the other VAT reports. I have read both topics and I think the second topic is only relating to the Dutch report based on your having two Vat accounts - Vat Payable and Vat Claimable.
The gist of the two topics I guess is down to how to enter the VAT when refunding a client for a product sold or getting a refund from a supplier. But I don’t really know whether this affects the VAT Calculation Worksheets.
I ask this because more than once I have had issues with Manager where at the end of the financial year or a particular quarter where the amount I need to pay in Vat Calculation does not match the amount owing on the summary tab despite the fact that they should match. I wonder if it is related to this where I have been refunded purchases etc.