Booking mollie

I use daily receipts for this. There are already some questions about daily receipts here in the community, you should search them. But from my own point of view, I enter the net amount (the payment, so to speak) in the daily receipts. Every day, because that's how it should be done, apparently. I don't do it every day to top it up, but I do fill it in on a daily basis (if that's still clear :p). And I always refer to my webshop in the description. Doesn't mollie send an invoice with their costs? Because then you would actually have to fill in the amount that the customer paid, right? Or do you not take mollie's invoice into account? So I book the payment as turnover and do not book mollie's separate invoice.

That seems like the wrong way to work to me. The turnover is the total amount the customer has to pay you, which includes transaction costs, shipping costs and the like. You can enter the total sales price in your daily receipts on the day of sale. You then enter mollie's invoice as an expense without paying it. The way you work, you do as if mollie is your customer and they are making the sale, but that is not the case. Mollie provides a payment service for you.