Can I import total sales each day?

Hi there,  I'm new to quickbooks and I already have a system that keeps track of our clients and billing and I would like to take the totals from that and import it each day as our sales.  So Daycare Sales, Classes Sales, Retail Sales etc.

I have linked up my accounts so the sales will be put in the next day but they don't always match up as clients put things on account.

Suggestions?