The above will be a good one,
or else,
Create a period based budgeting Report painter report, with 4FM library with the help of a set create quarters,
now open budget periods in tcode FMOPER,
while budget posting respective periods should be selected.
After a Quarter end, the left over budget can be transferred to next period.
However, budget check will be done at the availability of funds on a year level basis, not on a quarter budget basis.
TSK