I have a document that I track multiple serial numbers of reports. The trick is that reports initiated by our company have a unique serial number (N00164-18-0001) and reports that are initiated by outside users have a different serial number so the excel spreadsheet has mixed reports going down the list. When I initiate a new report, I have to go back through all the report numbers and verify the next sequential report serial number (N00164-18-0002). I want to make a "Next Report Serial Number" next to my table and I'm looking to see if there is a way to sequentially be able to see what the next report number should be. I only need to track our companies next report serial number. I hope this makes sense and someone has the answer on how to sequentially generate the next serial number even if the report numbers have different serial numbers mixed in with them. Thank you!