Google Sheets - Customer Account Creation

i run a small campground… about 80customers. I have created an account sheet.it includes all services selected by the customer (at the top). The bottom portion is a running account of costs incurred over the season. I share links to each worksheet to the respective customer. Would like to find an easy and quick way to merge this with a database of all customers info so that the top selections of the account sheet can get pre-filled. And sheets created for each customer.