Refer formula across modules with different time range
I have two modules named A and B. In module A, my time range is FY17 & FY18. And in my module B, the time range is FY18 & FY19. The fiscal year in my model is Jan to Dec. Now I want to refer the data of FY17 from module A to FY18 of module B. I have tried with Lag, lead and offset. But all these have the restriction as 'The time range providing arguments to a line item must match the time range for the result line item;. When I use Previous function, it is working fine. But I am getting result only for Jan18 from Dec17 with previous function. My requirement here is that I need to get the old year complete data from module A of FY17 to Module B of FY18.
Can you please help me?