Inside SAP Business One you can run a sales opportunity forecast report. Here’s how:
1) From the Modules tab navigate to Sales Opportunities > Sales Opportunities Reports > Opportunities Forecast Over Time Report
2) When the Opportunities Forecast Over Time Report Selection Criteria window pops up, select which data you would like to include and how you would like to group the report. Click OK.
3) The Opportunities Forecast Over Time Report will now generate: