Connecting Xero, QuickBooks, Sage and FreeAgent

OneSixth uses OAuth to connect to your accounting platform. We never ask for or store passwords. Each connection is scoped per organisation and can be revoked at any time from Settings → Linked accounts.

What we read

• Invoices, bills, and journals within the period(s) you're calculating.
• Chart of accounts and tax rates so we can post journals correctly.
• Organisation metadata (name, country, fiscal year end).

What we write

• VAT adjustment journals you explicitly approve.
• Optional: tax rates and nominal accounts during scheme setup, only after you confirm.

What we don't touch

• Bank feeds, payroll, contacts, fixed assets.
• Anything outside the schemes you've enabled.