An automatic debit note for an over-billed invoice now includes the GST the vendor charged on the excess.
Over-billing Debit Note Carries the Vendor's Tax
The automatic debit note for an over-billed purchase invoice claimed the taxable value only, leaving the GST on the excess with the vendor and the input tax credit standing on money not being paid. The note now carries the tax rate stated on the difference, or failing that on the invoice line it came from, and reverses the proportional input tax credit. An RCM invoice carries no tax on the note, as the vendor charged none.
A missing input-tax account is flagged on the Differences tab while the invoice can still be edited, rather than refusing the posting.