Do you know any extension that enables me to show quote price with tax, interact via quotations well and negotiate price easily with my customers? If you know any extension like that, let me know!
As for your requirement, Magento 2 Customer Quotation will perfectly match up to it. Besides showing tax with quote, there are much more cool features:
- Live Editor for Price
- Check Quote Request Process via email or onsite
- Enable / Disable Quotation Section For Each Product
- All products supported
- Compatible Magento 's Luma theme
Hope this will help.