Q: How do I change the firm name and address on the bills?
A: The address on the bills comes from one of two places:
1. The firm name and address shown here:
Setup > Other > Firm
2. The letterhead, bill format 255, which you edit here:
Setup > Bill Formats
The bill format for each matter determines which of these two sources is used. If you edit the bill format, choose Edit Sections, and look on the Header 1 tab, you will see four choices in the Firm Name And Address frame. If you choose any of the first three, then #1 above is used. If you choose the fourth one (Use Letterhead Design), then #2 above is used.
If you change the letterhead, you must save each of the bill formats afterwards. This is explained in more detail here: Can't change letterhead.
The bill format also offers the option to show the firm name and address on pages after the first one. That setting is on the Header 2 tab of the Edit Sections window. If you select this option, it always uses #1 above.