After you send a settlement to Wave, you can remove its sales invoice from inside Taxomate.
If Automatic sending is on, turn it off first (select Change next to "Automatic sending" at the top of the list).
Option 1. The invoice is not reconciled with a deposit in Wave
One settlement or payout: open it, select More actions, then Delete entries from Wave, and confirm.
Several: on Settlements (or Payouts), select the rows. In the bar at the bottom, select More actions. Under Remove entries, select Delete accounting entries (the same item for payouts), and confirm.

Option 2. The invoice is reconciled with a deposit in Wave
In Wave, go to Sales & Payments > Invoices.
Select All invoices.

Select View on each invoice you want to unmatch.

Select Remove payment, then confirm.

Go back to Taxomate and open the settlement or payout.
Select More actions, then Delete entries from Wave, and confirm. (Or use the bulk steps in Option 1.)
