It's nice to have you in the Community. I'd be happy to help you with bringing in the two months of banking statements that aren't in your QuickBooks.
There's a feature known as WebConnect, which allows a user to import bank transactions into their account. First, you will need to download the transactions from your bank's website in a file format that QuickBooks Online supports. The file needs to be 350 KB or less and be a .CSV, .QFX, .QBO or a .OFX.
Once you have the file, here's how to import it into your account:
Select Banking on the left Navigation menu and choose Banking.
Click the drop-down arrow next to Update and choose File upload.
Click Browse and select the file downloaded from the bank.
Choose the account that you'd like to upload the file into with the QuickBooks account drop-down list and click Next.
If uploading a .CSV file, you will be prompted to choose the columns for the banking fields.