I created invoices for customers after they deposited funds tomy account. they appeared twice in my salesrecord (double entry)

Hello Crystalfencinguk, 

Welcome to the community page, 

Have you by any chance recorded the deposits against sales? 

 If the invoices are unpaid at the moment you should change them to debtors and use them to pay the invoices, remove any VAT codes from the deposits as well

If the invoices are paid then you can just delete the deposits.