Price WITH tax in customfields

[Fossa]

VM 3.8.8
Joomla 3.9.25
PHP 7.4.16

In my VM shop, I show prices included tax.
For serveral products, I use customfields for adding an extra amount for improvements etc.
I have to add prices in customfield WITHOUT tax. My customers would prefer to see the additional price with tax.
Is this possible to change? I'm quite sure I've seen a setting for this choise!

Regards
Olav

[pinochico]

Is this possible to change?

Of course - go to customfield value in product detail and chage price WITHOUT TAX to price WITH TAX - it is very easy and elegant

[Fossa]

Thanks for answering, pinochico!

I still don't find any setting for WITH TAX or WITHOUT TAX..

[Fossa]

I changed backend language to English - but still don't find any menu entry for "product detail" nor any customfield entry with value "WITHOUT TAX" that I can change.
Any help would be highly appresiated, I'm really struggeling with this.

Regards
Olav

[pinochico]

but still don't find any menu entry for "product detail"

fnd better, it is core VM menu item

any customfield entry with value "WITHOUT TAX" that I can change

If I'm correct, don't exist, then I send custom solution last time.
So do you read?

Of course you can create hack in all views and calculate value with VAT ID x Customfield VALUE Without Tax self, but I think better is put price with tax into customfield value.
Have you tried?