If your opening balance is not reflecting correctly in the trial balance, then you need to check the below steps:
Step 1: Go back to the last financial year.
Step 2: In the Administration Menu, choose Change Financial Year.
Step 3: Click on the financial year from April 1, 20XX (i.e., last year), then click on the YES option to carry forward the balances.
Step 4: Carry forward in all masters and click on start to carry forward the balances.
Step 5: After carrying forward, your opening balance is not reflecting correctly in the trial balance, and you will be in the current financial year.