Get your taxes done using TurboTax

you can e-File five persons' tax return with  1 State program,  if they are all residents of the same state.

I guess that's obvious, but there is a state e-File fee each time.

After five returns are e-Filed, you mail in any additional tax returns at the Post Office.

to avoid state e-File fees, you can print and file all the state returns at the Post Office.