Filling the form after marking checkbox "I want to generate an invoice for the company" always results in the validation message "Field is required":
-> each time for field "company name"
-> and when trying to fill in the "tax" field - if it was left empty before.
As a result, you can't go to "Review Order".

Validation of fields "company name" and "tax" is working correctly:
-> if correct data were provided there is no validation message shown,
-> if field was left empty or wrong data were provided - validation message is shown.
Pick one option.
develop branch and create Pull Request 2. Feature / Improvement back to develop.release branch and create Pull Request 3. Stabilisation fix back to release.hotfix or master branch and create Pull Request 4. Hotfix back to hotfix.Related to #2742
I checked on Chrome 74 and Windows 7. Not reproduce, worked as expected. Tested versions v1.8.5 and v1.9.0.

@pkarw possible need exactly Windows 10 ?
@dimasch Please test it out on 1.10 (develop branch) - it supposedly occurs only there
@pkarw Yes, on develop branch reproduced.
I will to fix it.

OK cool. Please make sure the checkboxes in the My Account (all sections) work properly as well. I'm affraid there was a change regarding BaseCheckbox.vue that involves thsese kind of issues
Reproduced on Chrome 74, MacOS (not depends on OS)
@pkarw PR ready!
Thanks @dimasch ! :)