My partner is going self employed and needs simple software to enter income (weekly) and business expenses, get a net income figure and work out NZ tax and ACC due. Also calculate GST received, paid and due. She has only one customer (is a contractor). Essentially its just cashbook accounting.
I'd do it all on Excel but I don't know how to do a formula or otherwise get it to do different rates of tax st different bands of net income.
Does anyone have any recommendation or a suggestion for the formula?