Welcome to the Community. I'm glad you turned to us for help with balancing your financial reports.
One of the main reasons why your General Ledger doesn't match the Trial Balance is that you've credited amounts that should have been debited or vice versa, or you applied a transaction to the wrong account. On the Trial Balance report, it's also possible that several transactions have not yet been posted or updated to the General Ledger.
Let's open both reports and choose the same accounting method. From there, you'll have to go through each account and click on it. You can start with the journal entries and make sure they are posted correctly to the General Ledger. Then, double-check each ledger and ensure those were placed in the trial balance correctly.
Just in case you need additional information, you can also check out these articles: