Is this printer connected via USB?

I have more than one printer, both on WIFI.  How will the Mac know which printer to print to if I just try to add a generic printer?

I am also having this problem, just bought a brand new MacBook Air, transferred company file over from a Windows machine, but refusing to let me print checks due to 2-sided printer being on.

I even tried your link, followed instructions and turned off 2-sided printing for my Brother printer, but still stays on by default in Quickbooks and other applications.

How do I fix this?  This may be deal breaker for me if I cannot print checks.