You can use Float's Spreadsheet Input tool to easily copy and paste your forecast from elsewhere into Float.

While you can't upload directly from a spreadsheet, you can certainly copy your budgets right in.

Set a budget for any date within a month by using the date selector 

Simply select a date. Then enter, or copy and paste in your budgets and hit save. 

This can be repeated for budgets set for a different date.

 

You can also use Spreadsheet Input to move easily between cells and enter your budgets more quickly. And you can click and drag a cell to the right to copy it forward.

Spreadsheet Input is currently available in the 'Base' scenario but not on scenario layers