You can press the "Calculation" button in the relevant period row.
After the calculation is done, the status "NotCalculated" becomes "Calculated".
Note: You can also view accounting periods and start making calculations by clicking the relevant "Periods" button on the "Balance Sheet" screen.
Balance Sheet Recalculations
If you need to recalculate for a period of time, you can click on the relevant row and press the "Calculate Financial Statement" button.
Viewing Calculated Balance Sheet
To view the calculated balance sheet; In the FMA-500 - Balance Sheet report, you must select the Code - Name you specified during the Balance Sheet creation (as explained above) from the "Financial Statement" box.