You can write the title page and the letter or memo of transmittal as soon as you know:

A) what your talking headings should be.
B) what your audience's address is.
C) how long the report will be.
D) what your recommendation will be.

Transmittal

The process of sending or conveying information, documents, or goods from one person or place to another.

Title Page

The first page of a book, document, or report, containing the title, author's name, and other relevant information.