Hi there CharizeC,
It's vital you have all transactions entered correctly so that your books can be balanced. QuickBooks Online is a great tool able to help you with tracking the profitability of your company. I can point you in the right direction for assistance.
If after trying the steps mentioned further up the thread, you still aren't able to move over estimates to your project, I recommend reaching out to the QuickBooks Online support team outside of the Community. They'll be able to view your screen with you in a secure setting so see the way you're trying to move them over to provide some information on how to most effectively make this change. You can reach out to them using one of these methods:
Schedule a Callback or start a Chat: click (?)Help in the upper right > type and enter "Contact support" into the QB Assistant > click Contact Us > explain your situation > click Let's Talk > choose Get a callback or Start a Chat.
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If you have any other questions, feel free to reach out here.
