Do I really need to purchase an additional license because I have 3 computers?

Just remember, your company files on the different computers will be not be synced. You have to remember to make a backup, and restore that on the next computer, every time you move to one of the other computers. It seems like a simple thing to do, but it is very easy to forget, and enter data at 2 locations, and that cannot be combined!

If at all possible, it is way safer and better to use a remote access to make the entries all on the one computer.

how do I combine the data that was entered in two different computers?

i have a few estimates in one desktop and a few more things in one laptop, I did the backup in the laptop   using onedrive, but when I tried to restore in the desktop all the data that was there before does not show up anymore. 

please help

Thank you

Thanks for joining the thread, @yuriko.

I hope you're having a beautiful day. Allow me to provide some insight into combining two separate company files.

When you have two company files on two separate computers, QuickBooks Desktop will recognize each file but won't allow you to combine the two into one. However, if you need to blend the information in these two files, I recommend checking out the QuickBooks app center. The website has over 600 third party applications that you can search through to find an app that allows you to combine both company files into one. You can ask other Community members for their suggestions as well.

Feel free to hit the reply button if you have any further questions or concerns. Enjoy the rest of your day!