[PM-11525] Tax calculation shown to customers potentially incorrect

[jonashendrickx]

🎟️ Tracking

https://bitwarden.atlassian.net/browse/PM-11525

📔 Objective

This value is calculated using our exiting TaxRate records that we store in our own database and are managed via the Bitwarden Admin Portal. However, after we transitioned to using Stripe Tax for automatic tax calculations, there’s a likelihood that this “Estimated tax” value will be incorrect because whatever value we have saved could be different from the value Stripe calculates on the fly for the same zip code.

📸 Screenshots

⏰ Reminders before review

• Contributor guidelines followed
• All formatters and local linters executed and passed
• Written new unit and / or integration tests where applicable
• Protected functional changes with optionality (feature flags)
• Used internationalization (i18n) for all UI strings
• CI builds passed
• Communicated to DevOps any deployment requirements
• Updated any necessary documentation (Confluence, contributing docs) or informed the documentation team

🦮 Reviewer guidelines

• 👍 (:+1:) or similar for great changes
• 📝 (:memo:) or ℹ️ (:information_source:) for notes or general info
• ❓ (:question:) for questions
• 🤔 (:thinking:) or 💭 (:thought_balloon:) for more open inquiry that's not quite a confirmed issue and could potentially benefit from discussion
• 🎨 (:art:) for suggestions / improvements
• ❌ (:x:) or ⚠️ (:warning:) for more significant problems or concerns needing attention
• 🌱 (:seedling:) or ♻️ (:recycle:) for future improvements or indications of technical debt
• ⛏ (:pick:) for minor or nitpick changes