I hand write all my invoices up to 20 a day how do I then put them into my QuickBooks going forward?

Welcome to the Community, @birdfoodman.

In QuickBooks, you can record your handwritten invoices by creating an invoice in the + New tab.

Here's how:

1. Click the + New tab, then choose Invoice.
2. Enter all the necessary fields.
3. Select Save and close.

To save time by creating multiple invoices at once, this feature is available in QuickBooks Online Advanced.

For guidance on recording invoice payments, you can check this article: Record invoice payments in QuickBooks.

Feel free to reply to this thread if you have more questions about QuickBooks.