If you do not wish to list your exact street address, then scroll to the bottom to see how.
If you do not wish to list your exact street address, then simply also enter your town in the first line of the address (so your town will appear twice in your address), and only enter the first half of your postcode (rather than your entire postcode).
If you wish, you can still drag the map marker to your exact address, or you can simply click the “Set Address on Map” and it will find an approximate location (assuming you’ve only put in the first half of your postcode)