Hello rkaur,
Welcome to the QuickBooks Community! QuickBooks Online allows you to easily manage your customer list by letting you make customers inactive and then to make them active again if you need to bring them back. Don't worry, it's just a few quick steps and I'm happy to show you how it's done.
- Hover over the Sales menu and choose Customers.
- Select the small gear icon above the Action column in the customer list.
- Check off Include Inactive.
- Find the inactive customer in question and select Make active.
Just like that, the customer will return to your active list and you can begin creating transactions for them again. The following article goes over managing your customers in QuickBooks Online, including adding, removing, and merging them: Manage your customer list
I'll be here should you have more questions. Have a great weekend!
