ODS does not have the concept of a "tab" control.
Although the RTF specification DOES have a \TAB instruction -- the issue with the \TAB instruction is that different folks might have different TAB stops set in their word processor -- so that would not necessarily guarantee that the same amount of space was represented by a \TAB control string with RTF. I have seen folks insert a \TAB instruction into their RTF file using ODS -- but I prefer to use LEFTMARGIN or INDENT style attributes (INDENT or TEXTINDENT).
Thanks, everyone, especially Cynthia and polingjw. A combination of both your ideas work for us. Cynthia, I looked at the paper you referenced about complex reports. You show some complex tables that have some features that we could use. You mention that the code is available at the SGF website. I have tried and failed to find it there. Could you please give a link, or email me the code for those tables? Thanks so much for all of your help!
If you go to http://support.sas.com/rnd/papers/ you will get to the main site where papers by SAS staff are listed. The page is organized by year...and some descriptions just give a link to the published PDF and other descriptions give a link to download a zip file.
So if you go to the above web site, the quickest way to find my paper and the zip file that goes with it is to do a search in the browser for the word "Complex" and that should take you directly to the link for my paper. Alternately, you can scroll down to the section entitled "SAS Presentations at SAS Global Forum 2008" and my "Creating Complex Reports" section is the 8th presentation listed in that section.