How to correctly record services on an invoice versus payments of that invoice

Hi folks -- very basic question but how do I record services that I invoice versus payments for those invoices? right now both are being recorded as consulting income and that doesn't seem right as it doubles this account. Thanks! So when I get my bank entries and categorize payments, I was doing those as consulting income but that doesn't look right as such is the same category as services which are on the invoices. Thanks!