### Summary
This PR adds support for Isle of Man customers to use GB VAT tax IDs.
Isle of Man uses the UK VAT system, so Orb requires country: 'GB' for
validation - but the billing address country is IM.
- Adds an IM VAT entry to `TAX_IDS` with a new `taxCountryIso2` override
field, so the UI shows "IM VAT" while sending country: 'GB' to Orb
- Introduces `getEffectiveTaxCountry()` to resolve the correct country
code for Orb
- Introduces `resolveStoredTaxId()` to map stored Orb data back to the
correct UI entry, using billing address country to disambiguate IM vs GB
- Updates all three billing forms to use these utilities: Billing
Settings page, Add Payment Method modal and Update Billing Address modal
### Testing
#### Automated tests
I've added unit tests in this PR
#### Manual tests
You can use the following country/city/postal code combinations to test:
- Isle of Man, Douglas, IM1 2LE
- United Kingdom, Crumlin, BT29 4AA
**Billing Settings page**
- Select Isle of Man as billing country → tax ID dropdown shows "Isle of
Man - IM VAT"
- Select United Kingdom as billing country → tax ID dropdown shows
"United Kingdom - UK VAT" / "United Kingdom - GB VAT" (not "IM VAT")
- Select IM VAT, enter a valid GB VAT number, save → check network tab,
Orb receives country: 'GB'
- Reload page for an IM customer with existing tax ID → "IM VAT" is
pre-selected (not "UK VAT")
- Reload page for a GB customer with existing tax ID → "UK VAT" is
pre-selected (no regression)
- Change country from IM to GB → available tax IDs update, IM VAT no
longer shown
**Add Payment Method modal**
- Open modal for an IM customer with existing tax ID → "IM VAT" is
pre-selected
- Check "I'm purchasing as a business", select Isle of Man in Stripe
address → tax ID dropdown shows "IM VAT"
- Check "I'm purchasing as a business", select United Kingdom in Stripe
address → tax ID dropdown shows "UK VAT" / "GB VAT"
- Submit with IM VAT → check network tab, tax ID is saved with country:
'GB'
- Open modal for a GB customer → no regression, "UK VAT" shown as before
**Update Billing Address modal**
Appears for paid orgs missing a billing address
- Open modal for an IM customer with existing tax ID → "IM VAT" is
pre-selected
- Open modal for a GB customer with existing tax ID → "UK VAT" is
pre-selected
- Fill in IM address + IM VAT and save → saves correctly, modal closes
---------
Co-authored-by: Ignacio Dobronich <ignacio@dobronich.com>
This PR fixes some prettier issues:
- Bump and unify all prettier versions to 3.7.3 across teh whole repo
- Bump the SQL prettier plugin
- When running `test:prettier`, check `mdx` files also
- Run the new prettier format on all files
---------
Co-authored-by: Joshen Lim <joshenlimek@gmail.com>
### Summary
This PR adds a dismissable modal that prompts paid org users to fill in
their billing address. We need billing addresses for tax compliance and
the existing banner hasn't been as effective (~10k orgs still missing).
The modal shows on page load when all of these are true:
- ConfigCat flag `enableBillingAddressModal` is on
- Org is on a paid plan (not free)
- Org does not have billing address set
- Org is not partner-managed
- User has BILLING_WRITE permission on stripe.customer
The modal can be dismissed via the close button, but re-opens on every
page navigation.
Once the user saves a valid address, the organizations query is
invalidated and organization_missing_address flips to false - the modal
stops appearing permanently.
<img width="1256" height="703" alt="Screenshot 2026-03-05 at 4 22 11 PM"
src="https://github.com/user-attachments/assets/57e7d1b8-b3b6-4366-ad23-60910a0defe8"
/>
### Testing
#### Automated Tests
I've added unit tests in this PR
#### Manual testing
Manual test cases:
- Free org - modal does not appear
- Partner-managed org - modal does not appear
- User with "developer role" modal does not appear
- Configcat Flag disabled - modal does not appear
- Dismiss modal, navigate to another page - modal re-opens
- Fill form and save - modal closes and does not reappear
- API failure loading billing data - shows error state with Retry button
---------
Co-authored-by: Ignacio Dobronich <ignacio@dobronich.com>
