Rounding Option is already added as an option in Financial Statements Reports for below
Profit and Loss Statement
Balance Sheet
Cash Flow Statement
Statement of Changes in Equity
but it is not added to below reports under General Ledger
Trial Balance
General Ledger Summary
please extend this option to General Ledger Reports and others where is applicable such as Customer Summary, Supplier Summary and others
As @Joe91 rightly pointed out, decimal places can be the source of discrepancies in accounts. It’s therefore not a good idea to round figures in such important reports.