I can help you connect your bank account to QuickBooks Online (QBO).
In QBO, connecting your bank or credit card account helps you streamline your bookkeeping process and save valuable time that would otherwise be spent on entering transactions manually. However, depending on your bank, banks let you download the last 90 days or up to 24 months' worth of transactions. Otherwise, you can manuallyimport bank transactions to QuickBooks Online.
Here's how:
Go to Bookkeeping and select Transactions. Then, click Banktransactions.
If this is the first bank account you’ve set up, select Connect account. Or select Link account if you already created one.
Search for your bank. You can connect with most banks, even small credit unions.
Sign into your bank by entering your banking username and password. Then select Continue.
Read through the terms and conditions, select Agree, and then follow the on-screen steps to connect. Your bank may require additional security checks.
Select any accounts you want to connect, like, your savings, checking, or credit card. Then choose the matching account type from your chart of accounts in QuickBooks.
Choose a date to start adding transactions to QuickBooks.
Furthermore, once you've successfully connected your bank account, you can check out these articles for future reference in managing bank transactions and reconciling accounts: