You should be able to use 100.00 as a reallocation percent, effectively moving the year's net changes to a different account. I was able to save this reallocation detail on one account, and run the Create Reallocation batch function to generate the batch that does the actual reallocation when posted.

If you only need to reallocate a precent less than 100, it is OK to put the remaining percentage to the original account being reallocated. Just remember to only run the function once.