Reviewing my stack of work, I still have 1 return dropped off in Mid-March. Small Sch C with wages. Apparently one w2 form is lost or client too lazy to get from old employer. Owes taxes on the return without the lost form. Client won't return calls or emails etc. Always seems like there's 1 of these lazy ones with no concern of the rules etc. Wondering should I e-file an extension? But then what if he doesn't stop in to sign the efile etc. Just curious what everyone else does wi