VAT calculation not exact

Hi guys,
I think Invoice Ninja is having trouble rounding VAT amounts.
Suppose I want to sell a product for 10€ VAT included (21%)
Invoice Ninja only allows the following combinations:
 8,26 + 1,73 = 9,99€
 8,27 + 1,74 = 10,01€
This happens in both exclusive and inclusive tax methods.
In another accounting SAAS, the invoice is as follows:
 Subtotal: 8,26€
 VAT: 1,74€
 Total: 10,00€
But right now, in Invoice Ninja there is no way to put a total of 10€ that contains 21% VAT.
Is there any way to solve it?
Thanks!

Hi @martinkbs,
this sounds like something that is better suited for the invoice ninja developers directly. https://forum.invoiceninja.com/

Hi @fbartels,
Yes, it is actually a fairly frequent question that remains unsolved since Invoice Ninja version 4.X. They promised to fix this bug in version 5.X, but it still remains unsolved (https://forum.invoiceninja.com/t/invoiceroundingamountsnotlimitedto2decimalplaces/3978)
I have posted it here, in case someone in the community had the same thing and had found a way to solve it. Surely you have to touch some .php file that controls the rounding of taxes, but they are not accessible in the Cloudron package.
For example:
/tests/acceptance/TaxRatesCest.php
$total = $itemCost; $total += round($itemCost * $invoiceTaxRate / 100, 2);
/app/Models/Invoice.php
/** * @param $invoiceItem * @param $invoiceTotal * * @return floatint */ public function getItemTaxable($invoiceItem, $invoiceTotal) { $total = $invoiceItem>qty * $invoiceItem>cost; if ($this>discount != 0) { if ($this>is_amount_discount) { if ($invoiceTotal + $this>discount != 0) { $total = $invoiceTotal ? ($total / ($invoiceTotal + $this>discount) * $this>discount) : 0; } } else { $total *= (100  $this>discount) / 100; } } if ($invoiceItem>discount != 0) { if ($this>is_amount_discount) { $total = $invoiceItem>discount; } else { $total = $total * $invoiceItem>discount / 100; } } return round($total, 2); }
If someone has found how to solve it ...