Hi Catalina,
The standard Odoo functionality allows to print only labels with fixed design and content. That labels can be changed and extended by additional information, only with coding.
If you need to make your own label designs, put various product data on them, you can take a look at this Product Label Builder solution.
You will get not only the possibility to specify to include on not taxes to prices on a label, but others, like as:
- pricelist selecting
- adding several prices to a label (such as a regular crossed out price with a promo price)
- adding barcodes, OR codes, images to labels
- editing your label templates via Odoo UI
- direct printing without PDF downloading
- and others

This video shows how this solution works:
Best regards, Yurii Razumovskyi.
Company Garazd Creation — Odoo solutions for e-Commerce, SEO, Data Feeds, Website Tracking, Marketing, Analytics, and Marketplace integrations, Product Label designing and printing.
https://garazd.biz | Our solutions on Odoo
Hi,
I found a workaround for this issue.
You can create a new price list with a negative discount equivalent to your tax rate.
For example, if the tax rate in your country is 19%, you can create a price list with a -19% discount. When printing the labels, just select this price list, and it will display the prices with tax included.
This method works without needing any code changes or additional apps.