diff --git a/xero_accounting.yaml b/xero_accounting.yaml
index 663959fc4..fec7cfb57 100644
--- a/xero_accounting.yaml
+++ b/xero_accounting.yaml
@@ -22474,20 +22474,45 @@ components:
           readOnly: true
           x-is-money: true
         SubTotal:
-          description: Total of invoice excluding taxes
-          readOnly: true
+          description: >
+            Total of invoice excluding taxes. Calculated automatically by Xero from the
+            invoice's line items. Only for ACCPAY and ACCREC invoices, where this
+            opt-in capability is enabled for your organisation, can SubTotal be supplied
+            on write – on a SUBMITTED or AUTHORISED invoice supplied together with
+            TotalTax and Total, it is validated against the calculated line item totals
+            (see RoundingAmount); it is ignored in all other cases. This write behaviour,
+            and the returned value reflecting it, only applies to the Create and Update
+            endpoints (POST/PUT) and to retrieving a single invoice by ID (GET by ID) –
+            it does not apply when listing invoices (GET)
           type: number
           format: double
           x-is-money: true
         TotalTax:
-          description: Total tax on invoice
-          readOnly: true
+          description: >
+            Total tax on invoice. Calculated automatically by Xero from the invoice's
+            line items. Only for ACCPAY and ACCREC invoices, where this opt-in capability
+            is enabled for your organisation, can TotalTax be supplied on write – on a
+            SUBMITTED or AUTHORISED invoice supplied together with SubTotal and Total, it
+            is validated against the calculated line item totals (see RoundingAmount); it
+            is ignored in all other cases. This write behaviour, and the returned value
+            reflecting it, only applies to the Create and Update endpoints (POST/PUT) and
+            to retrieving a single invoice by ID (GET by ID) – it does not apply when
+            listing invoices (GET)
           type: number
           format: double
           x-is-money: true
         Total:
-          description: Total of Invoice tax inclusive (i.e. SubTotal + TotalTax). This will be ignored if it doesn’t equal the sum of the LineAmounts
-          readOnly: true
+          description: >
+            Total of Invoice tax inclusive (i.e. SubTotal + TotalTax + RoundingAmount).
+            Calculated automatically by Xero from the invoice's line items. Only for
+            ACCPAY and ACCREC invoices, where this opt-in capability is enabled for your
+            organisation, can Total be supplied on write – on a SUBMITTED or AUTHORISED
+            invoice supplied together with SubTotal and TotalTax, it is validated against
+            the calculated line item totals plus RoundingAmount; in all other cases this
+            will be ignored if it does not equal the sum of the LineAmounts. This write
+            behaviour, and the returned value reflecting it, only applies to the Create
+            and Update endpoints (POST/PUT) and to retrieving a single invoice by ID (GET
+            by ID) – it does not apply when listing invoices (GET)
           type: number
           format: double
           x-is-money: true
@@ -22497,6 +22522,35 @@ components:
           type: number
           format: double
           x-is-money: true
+        RoundingAmount:
+          description: >
+            An optional rounding adjustment added to SubTotal + TotalTax to give Total
+            (i.e. Total = SubTotal + TotalTax + RoundingAmount). Only applies to ACCPAY
+            and ACCREC invoices, and only if this opt-in capability has been enabled for
+            your organisation. Not validated while the invoice is DRAFT. For SUBMITTED and
+            AUTHORISED invoices, RoundingAmount is only applied when SubTotal, TotalTax
+            and Total are all supplied together, and must be between -0.10 and 0.10 –
+            values outside this range are rejected with a validation error (on DRAFT
+            invoices, an out-of-range value is ignored instead). This field is only
+            settable and only returned via the Create and Update endpoints (POST/PUT) and
+            when retrieving a single invoice by ID (GET by ID) – it is not returned when
+            listing invoices (GET)
+          type: number
+          format: double
+          x-is-money: true
+        EnteredTotal:
+          description: >
+            The total amount as originally entered for the invoice, before any
+            RoundingAmount adjustment is applied. Only applies to ACCPAY and ACCREC
+            invoices, and only if this opt-in capability has been enabled for your
+            organisation. Can only be set while the invoice is DRAFT; once the invoice
+            is no longer DRAFT this reflects Total. This field is only settable and only
+            returned via the Create and Update endpoints (POST/PUT) and when retrieving a
+            single invoice by ID (GET by ID) – it is not returned when listing invoices
+            (GET)
+          type: number
+          format: double
+          x-is-money: true
         InvoiceID:
           description: Xero generated unique identifier for invoice
           type: string