Delete everything?

Hi is there a way to delete everything and start again? I am a sole trader and due to asking someone else to help out my account is a mess, personal and business statements have been uploaded and reconciled, don’t know how! Invoices are entered as expenses. I really think its best to start again as I don’t have a massive amount to enter. Helper sacked!

See the following post. Just make sure you untick the last box so you can keep the account active once you have deleted all the content.