Desktop to Online Migration

Thanks for reaching out to the Community, susanm5860.

Time entries can be deleted one-by-one from a customer's Time Activity screen.

Here's how:
 

1. In your left navigation bar, go to Sales, then Customers.
2. Double-click the customer that has unbilled time charges.
3. Look for your billable time transaction and hit its Edit option.
4. The Time Activity page will be displayed. At the bottom center of your screen, select Delete.

I can certainly understand how an ability to delete multiple time entries at once could be useful and have submitted a suggestion about it as of today.

You can also submit your own feature requests while signed in.

Here's how:

1. Use the Gear icon, then go to Feedback.
2. Enter your suggestion(s) in the Have feedback? window.
3. If necessary, attach a file with your Camera icon.
4. Select Next.
   
   

Your feedback's definitely valuable to Intuit. It will be reviewed by our Product Development team and considered in future updates. You can stay up-to-date with the latest news about your product by reviewing Intuit's Product Updates webpage.

I've also included a detailed resource about working with timesheets which may come in handy moving forward: Delete timesheets out of weekly timesheets

Please don't hesitate to send a reply if there's any additional questions. Have a wonderful Tuesday!

@susanm5860 

You need to purchase a 3rd party condense service to remove those data before converting the condensed data to QB Online.