How to split long tables by a page break?

[WelliSolutions]

I have written an invoice with several items and each item has details.

The table gets very long, so that the first page of the PDF file only contains the letter header, the second page contains the table and the third page contains the closing note.

What do I need to change to get page breaks within the table, so that my invoice fits on two pages and the first page doesn't look empty?

I tried using tblr and longtblr, but I ran into \noalign issues.