you can pay off more than one invoice for the same vendor.

src/clj/auto_ap/graphql.clj

@@ -387,8 +387,7 @@
                       :resolve :mutation/print-checks}
 
     :add_handwritten_check {:type :check_result
-                            :args {:invoice_id {:type :id}
-                                   :amount {:type 'Float}
+                            :args {:invoice_payments  {:type '(list :invoice_payment_amount)}
                                    :date {:type 'String}
                                    :check_number {:type 'Int}
                                    :bank_account_id {:type :id}}