LeanLaw can attach trust statements to invoices as PDF files. Here is how. Go to Billing > QuickBooks (this only works for invoices that are in QuickBooks, not draft invoices).
Invoices can be attached either to a specific invoice using the dot-dot-dot menu (1), or by bulk using the function below the invoices called "Attach Trust Statement" (2) as shown here:
A paperclip icon will appear next to invoices that have trust statements attached (3). If an invoice already has a trust statement attached, invoking the "Attach Trust Statement" function will replace the current attachment with a new version.
The trust statement is attached as a PDF file called TrustStatement.pdf on the QuickBooks invoice. To review it, pick "Open in QuickBooks" and open the attachment from the invoice in QuickBooks.
Here is a suggested workflow:
Create your monthly invoices and send them to QuickBooks
Go to the QuickBooks tab in billing section of LeanLaw
Select the filters "Not paid" and "with Trust" to see all invoices that haven't been paid and that have trust against them
Select invoices and "Pay from Trust" to pay invoices from trust
Select the filters "Paid" and "with Trust" to see the invoices that were just paid
Select them and pick "Attach Trust Statement"
Select them again and click Deliver -> Email to send them to clients