Commercial and invoices
The Commercial tab is invoices and payment on the job. It is not the cost database.
Open the project → Commercial to raise or follow invoices for this job.
If you take card payments, connect Stripe under Settings → Client payments first.
Xero sync, if you use it, is under Settings → Integrations. A payment in Quantifiable can then appear in the ledger you already run.
Nothing here changes a BoQ rate. It is money in from the client, not the estimate.
Examples
Fee invoice
After the client accepts the estimate, raise a fee invoice on Commercial. Send the pay link. When Stripe marks it paid, the dashboard commercial card updates.