The client's concern is that we did not ask for "prepaids" or "deferred revenue" - common items for this service oriented company.
Inform him that it is necessary to impute the value of ALL of the assets and ALL of the liabilities onto the balance sheet entries. If a specific type of asset is not listed on our tool, then "other current assets" should be used. If a specific type of liability is not listed, it should be entered into either other current or other long-term liabilities.
Also inform him that once ALL assets and ALL liabilities have been entered, we know by default what the total equity (book value for the company) or total shareholder's equity/member's equity/partner's equity is as of the date of the balance sheet figures.