How do i edit fax numbers stored in my machine

You can download users manual from www.brother.com it will be under product support.

Press yhe edit Jobs key on screen, select job and press stop, or press edit and add 9

You can't. Groups cannot be edited...only deleted then recreated.

On the installation cd's of the machine there is a fax driver if you install the fax driver the fax is showing as a fax in the printers and faxes in the controll panel.If you print to the fax a window will open where you tipe the name and number you want to send the fax to.There is also a option if you want to add it to the addresbook.After editing the info add it to the receipient list and send.Your document will faxed from your computer via the IR machine,if your machine is connected to a fax line.
You can edit the address book easy by logging to your machine via your broser tipe the ip address of the machine in your browser and press go.If the machine is connected via local LAN.

From Ricoh Aficio MP2550 manual:

Delete destinations registered in the LAN-Fax Address Book:
On the [Start] menu, point to [All Programs], [LAN-Fax Utilities], and then click [Address Book].
The [Address Book] dialog box appears.
If LAN-Fax Driver has already started up, click [Edit Address Book...].
Click [New/Browse...], and then select the CSV file containing the address list to be edited.
Select the destination you want to delete so it is highlighted in the list.
Click [Delete].
Click [Yes].
Click [Close].
If you made changes to a destination, a confirmation message appears. To save the changes, click [Yes].
If you do not want to save the changes and want to quit editing, click [No].
To return to the editing display, click [Cancel].
The confirmation dialog box does not appear when you have not made any changes after starting Address Book.

You can download the manual (HTML or PDF/ZIP versions) from here:
http://support.ricoh.com/bb_v1oi/html/oi/rc2/model/mp33/mp33en.htm

How do you change the number on the HP office jet all in one Fax machine.

Sorry, no. You have to edit all of them, one at a time.

Function
7
monitor key slowly 4 times
*
6
scroll down to ALL JOB CLEAR
set
wait for machine to reboot

all you need to do is push and hold the speed number button that you what to chang till it starts blinking in the display. i think the name comes up 1st. press enter if that's o.k. ore use the courser to delete. if you have pressed enter then the number show-es up press the arrow key back to erase @ enter the correct numbers. hit enter key. if you git in to something you don't know press the stop key 2 times will git you back to main screen

http://www.ricoh-usa.com/downloads/manuals.asp?tsn=Ricoh-USA

This is the link for the manuals
Scroll down to Facsimile
From the Drop Down Menu, choose your machine and click GO
It will take you to the manual (PDF format)

I hope this will help you.