Vat Return Not Displaying Correctly

[ModeBan]

if you generate the vat return and then cancel an invoice the vat calculations in the boxes is not adjusted.

for example i have an invoice of 20 and vat 4.20 so total 24.20

Vat 4.20 goes into the boxes thats fine.

I cancel the invoice and reload the vat return page.

4.20 vat (that has been cancelled) is still present which should not be the case.

Can you add a button to "refresh/update" the values?