Why am i Missing 75% of my client list

Your customers can be inactive, which is why they aren't appearing in the customer lists, Noah.
 
We can look through the customer list to determine if any of your customers have been labeled as inactive.
 
Here's how:

1. Log in to your QuickBooks Online(QBO) account.
2. Go to Sales and select Customers.
3. Click on the Gear icon.
4. Scroll down and check the Include inactive box.
    

From there, you will see your other customers that have been marked as inactive in the customers list.

You can reactivate them simply by clicking the Make Active button.

If your customers are not marked as inactive but still don't show up in the customer list, consider refreshing your QBO website to update the system.
 
Please feel free to leave a reply below if you have additional questions or concerns about QuickBooks. The Community team is always here to assist.