You can set tax rate at Settings > Invoice page.
Remember changing tax rate does not alter tax rate in the invoices that are already issued in the past. All items including tax rate in the issued invoices remain the same.
You can change the tax Percentage by following these steps:
1) Login to https://coworkify.com/
2) Click to the Settings > then Invoice tab on the left side
3) Scroll down to the Tax #1 settings and enter the following information:
- Tax Name - enter a preferred name for your tax
- Tax Rate (In Percentage) - add your percentage of tax here
- Tax Display - select whether the tax rate should be applied on gross or net
4) Save these settings and the will reflect on all invoices you create going forward.