Impact on price Tax included in combinations

Checkout my input fields, and the tax incl. is available on all my PS 1.4 and 1.5 sites. I always use this field and the price tax excluded calculates automatically.

On the product on your screenshot, do you have any tax assigned? I've never seen only the tax excluded impact field, I always have both, and it helps a lot.

Hmm, this is really strange. I checked on several sites just to confirm what I said, and I found that all my PS 1.4 sites have both fields (pre-tax and post-tax prices). However I have 2 shops running PS 1.5.6.2 and one shows both fields and the other one shows as your screenshot - just the pre-tax field - so I am trying to figure out if it is a setting that changes that or whatever it is. On the rest of the sites the post-tax field does show and it works correctly.

Ok I found it. The input field post-tax is disabled in multishop mode only (because different shops can have different tax rates), and is enabled in single-shop configurations.

yeah, I know that, but after if you try to edit a combination because the price of that specific combination changed there is no post-tax impact field. And sometimes combinations for a product cannot be generated with the generator because it creates lots of unnecessary combinations (that you don't offer).