v2.4.0 (2015-1-7)

• Add Invoice#original_invoice for refund invoices

v2.3.8 (2014-12-22)

• Add Invoice#tax_region and Subscription#tax_region
• Add Invoice#address and Subscription#address when previewing
• Add Subscription#update_notes to update a subscription's notes
• Add AddOn#accounting_code

v2.3.7 (2014-12-8)

• Add 'public_key' property to Recurly.js
• Adds support for reading and writing custom invoice notes

v2.3.6 (2014-11-6)

• Fixes issue with broken association lookups

v2.3.5 (2014-10-30)

• Adding invoice refunds by line item: invoice.refund(line_items)

v2.3.4 (2014-10-3)

• Adding invoice preview: account.build_invoice 0bc0d01

v2.3.2 (2014-9-9)

• Added Amazon Billing Agreement support 024269
• Added account entity_use_code when the site is integrated with Avalara 633df6
• Added bulk parameter 8cb157

v2.3.1 (2014-5-23)

• Added subscription change preview: subscription.preview
• Added subscription estimated cost for new and change previews: subscription.cost_in_cents
• Added subscription remaining billing cycles: subscription.remaining_billing_cycles

v2.3.0 (2014-5-14)

• Added subscription preview: Recurly::Subscription.preview
• Added tax details to adjustments: adjustment.tax_details
• Removed taxable support on adjustments
• Added tax_exempt to accounts, adjustments and plans
• Added tax_rate, tax_type to invoices and subscriptions
• Added tax_in_cents to subscriptions

v2.2.3 (2014-5-9)

Features

• Added token_id support to BillingInfo #137