How to incorporate taxes into your cashflow
Float is tax inclusive but it doesn't automatically calculate or input your taxes for you. What you need to do to add your taxes is go to the 'Manage table layout' option (above the left side of the main cashflow table) and add a VAT/GST/tax category (if you haven't already). Then go to your accounting software and run a report to view your estimated upcoming taxes.
Then just enter this into Float, either via Spreadsheet Input, or directly in the cells you want. You can set quarterly budgets if you pay quarterly.