for the version part, it really depends how you have built your model. If you have built it with native Anaplan versions, then you should simply have the switchover on your forecast in which case the forecast contains the actuals already. If you can't have the switchover you'll have no choice but to [SELECT:Versions.actuals] For doing the last 12, Id' use the formula MOVINGSUM like this: movingsum = MOVINGSUM(module.line item, -12, -1,SUM) do this in your source module then in your target module: source module.movingsum[select:versions.actuals]
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