If your client needs to pay a tax on the overall fee of their proposal such as VAT or GST then you'll want to ensure you add this in your pricing settings. Here's how..
How To Add Your Tax Labels
Step 1. Go to Configure > Pricing Tool-Set up
Login to the admin area of your app and go to your pricing settings.
Step 2. Adding your tax labels
Scroll down and add in your tax label..
and the tax percentage..
Step 3. Save your settings
Preview Your Changes
Once you have set your tax labels, the VAT will show when you create a proposal and hit get calculation.
>> Configure your pricing settings