Here are the steps to follow if your bill references were not carried forward in BUSY:
Step 1: Open company then go to the Administration menu and click on Change Financial Year.
Step 2: Choose the last year option and click Yes to confirm changing the financial year.
Step 3: Then go to the Display menu, and click on Outstanding Analysis report, then select On Account Entries.
Step 4: Check the report for any entries. If there are, you'll need to create a reference for each entry and save the voucher.
Step 5: After creating the voucher references and finalizing last year's data then carry again it forward to the next year.
Step 6: Again Go back to the Administration menu and choose Change Financial Year again. select the new year option.
Step 8: A dialog box will appear with options like Carry Balance All Masters, New, and Change Master. Select Carry Balance All Masters, and it will update balances in the next financial year.
Step 9: Once the process is done, double-check the outstanding report for the selected parties to make sure the reference is showing.