The required adjusting entry would be to debit the Accounts receivable; credit; service revenue
When a company provides its goods or services for credit, then the amount that is to be received by the company is termed as Accounts Receivable. In the balance sheet of the company, accounts receivable are reported in the current assets section.
The sales that are being reported by a company related to the services that it provides to the customers is referred as service revenue. This can be either billed or unbilled in nature until receiving the amount. In the example given the services is not yet billed by the company. hence the required adjusting entry would be to debit the Accounts receivable and credit the service revenue.