does Turbotax software do Single Member LLC tax returns? It does not let me enter "1" as teh answer to "How many members does the business have?"

[VolvoGirl]

Yes.  It depends on how your Single Member LLC is set up.   Are you using the separate Business Desktop program?   

A single owner LLC would be reported on your personal 1040  Schedule C as self employment unless the LLC elected to be treated as an S corp or C corp.  So you would fill out a schedule C in your personal return for it.  Home & Business version is for personal 1040 returns, including returns that have a schedule C.  Or you can use the Online Premium version to fill out Schedule C.

If your Single Member LLC elected to be a S corp you need to file a 1120-S return using the Business program.   Did you pick 1120-S when you started?