Opening balances completely wrong

Hi - I've been using books for about a year now, having originally used invoice for a number of years. Over the last year I've noticed that my cash flow figures are constantly completely wrong and seem to have worked out it's because the opening balances have never been set correctly

Currently my cash as at end of next financial year is showing as minus £300k and my income figures for the year are completely wrong as well.

The instruction on the zoho tutorial are all geared towards importing balances from your previous accounting system but do not mention how to enter them in correctly from scratch.

I've been chatting to support about this for the past week and don't feel any closer to a solution.

Can you help

thanks