The availability of invoices for transactions will depend on the specific accounting software you are using, as well as the policies of your business. But here are few steps you can refer to:
1)Check your accounting software
2)Check your email
3)Contact vendors directly
4)Maintain a physical or digital file management system
5)Consult with your accounting team or professionals
Keeping invoices in an organized manner, can simplify the process of finding them when needed.