Hi!
Syncing your Xero chart of accounts, Tax Rates and Bank accounts, and Xero Tracking Categories all happens with a single click.
Please see below how to sync your Payhawk and Xero accounts:
Go to the Settings app
On the left menu click Integrations
Press the 3 dots on the Xero integration
Press Manually sync

It's always a good practice to sync your integration before you are pushing changes.
More questions? Feel free to ping us on Intercom.