Currently, if an invoice is created without first linking it to a job, there is no way to later connect that invoice to an existing job. This creates issues for workflows where invoices are generated before job details are finalized or when correcting record-keeping errors. Please add the ability to retroactively associate any invoice—regardless of how or when it was created—with any job in the system. This flexibility would greatly streamline operations and improve data accuracy for businesses that need to reconcile jobs and invoices after the fact.