Mailed state return (IL) without signature. Should I send a second one with sign?

[Bootkanp]

Just realized that I mailed my IL tax returns without signature. Should I send a second signed copy?

[BillM223]

No, do not send another IL return.

If they notice that the return is unsigned, they will send it back to you to sign.

Otherwise, there's no problem.

[Bootkanp]

Thanks @BillM223. Would I be charged a late filing penalty if they notice that my return was initially sent without a signature and then returned to me for signing? 

[BillM223]

I don't practice in Illinois so I can't say, but I doubt it. They know when you originally mailed your return.

Besides, a second filing would just confuse them.