def METHOD_NAME(self):
    invoice = self.init_invoice("in_invoice", products=[self.product_a])
    invoice.action_post()
    wizard = (
        self.env["account.move.reversal"]
        .with_context(active_ids=invoice.ids, active_model="account.move")
        .create({"journal_id": invoice.journal_id.id})
    )
    wizard.reverse_moves()
    refund = wizard.new_move_ids
    self.assertEqual(len(refund.line_ids), 4)
    tax_lines = refund.line_ids.filtered(lambda r: r.tax_line_id)
    self.assertEqual(len(tax_lines), 2)
    # One of the tax lines should have expense account and the other the tax account
    self.assertNotEqual(tax_lines[0].account_id, tax_lines[1].account_id)