Hello,
Thanks for reaching out!
If I understood correctly, your product prices have tax included, but you would like to display both the price with and without tax.
I think the Price display suffix option in the Settings > Tax page might what you’re looking for.
There, you can choose to show one price or the other by adding ({price_including_tax}) or ({price_excluding_tax}) to the suffix, like this:

Link to image: https://snipboard.io/z3A7H4.jpg
Which will show for the visitor, like this:

Link to image: https://snipboard.io/XtkGRJ.jpg
Please let us know if we can be of any further assistance.
We haven’t heard back from you in a while, so I’m going to mark this thread as resolved – we’ll be here if and/or when you are ready to continue.