Verify that you don’t have any additional diagnostics related to the Schedule L, which may clarify where the difference is coming from. This includes all FYI and Critical diagnostics.
Verify that you don’t have any overrides entered in Forms View.
Do you recognize the amount by which you are out of balance? If so, is the item being included, doubled, or excluded from the Schedule L?
Are the total assets, total liabilities, or neither correct?
Which lines are incorrect on the Schedule L?
If Retained Earnings aren't correct and you have followed the steps earlier, which line on the M-1 or M-2 is incorrect?