MS Access Invoice

I have a small delivery business that I use MS Access to manage deliveries and dispatch deliveries to a driver. I created this program over the last 20 years myself using MS Access. It is split into Frontend and Backend. I retired from my business 6 years ago and I haven't kept up with Access. I need to add customer invoicing and driver payment to my program. I have the Invoice Report created and I have tried to create the code to create the invoice and driver payment but have forgotten too much over the last 6 years. My program needs to work like most in that it should mark deliveries as invoiced (printed) and keep track of driver pay per individual deliveries. I will require the highest level of MS Access experience to assist me with this project. It is something that I can eventually do myself but the re-learning curve is to great. If you have extensive MS Access experience please consider helping me with this small project.