Turkey VAT not calculated for SaaS tax-inclusive checkout
We are seeing an issue with Turkey VAT calculation on tax-inclusive SaaS products.
Product setup:
- product_id: pdt_0NltE3K4yQ6uU4S4lVlLU
- tax_category: saas
- tax_inclusive: true
- currency: TRY
- price: 150000
Checkout preview request:
- billing_address.country: TR
- billing_currency: TRY
- minimal_address: true
Observed result:
- current_breakup.tax: null
- current_breakup.subtotal: 150000
- current_breakup.total_amount: 150000
Expected result:
Turkey VAT should be calculated and broken out from the tax-inclusive total, similar to other supported countries.
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Issue: TR VAT not computed for tax-inclusive SaaS subscription in checkout preview
Environment: [Test or Live]
Request ID: a2ec68c47e5a3a71-IST
Product:
- product_id: pdt_0NltE3K4yQ6uU4S4lVlLU
- tax_category: saas
- tax_inclusive: true
- currency: TRY
- price: 150000
Preview input:
- billing_address.country: TR
- billing_currency: TRY
- minimal_address: true
- (subscription product)
Observed:
- is_byop: false
- current_breakup.tax: null
- current_breakup.subtotal: 150000
- current_breakup.total_amount: 150000
- tax_rate: 0
Expected:
- Non-zero VAT breakdown for TR on tax-inclusive SaaS (net + tax split), while total remains 150000.

Subject: Bug - TR VAT returns 0/null for tax-inclusive SaaS subscription preview (is_byop=false)
Request ID: a2ec68c47e5a3a71-IST
Status: 200
Repro payload:
{
"product_cart": [{"product_id":"pdt_0NltE3K4yQ6uU4S4lVlLU","quantity":1}],
"customer": {"name":"Test User","email":"..."},
"billing_address": {"country":"TR","city":"Istanbul","zipcode":"34000"},
"billing_currency": "TRY",
"minimal_address": true,
"confirm": true
}
Observed response:
- billing_country: TR
- is_byop: false
- current_breakup.total_amount: 150000
- current_breakup.subtotal: 150000
- current_breakup.tax: null
- product_cart[0].tax_rate: 0
- product_cart[0].tax: 0
- product_cart[0].tax_category: saas
- product_cart[0].tax_inclusive: true
- product_cart[0].is_subscription: true
Expected:
Non-zero tax breakdown for TR tax-inclusive SaaS subscription (net+tax split), with total remaining 150000.