I've been filing married jointly the last 6 years. This year, things are contentious with my wife, and I don't believe she will sign the IRS form.I am the sole breadwinner. Do I need her signature to file jointly? Or is there a workaround.One possibility is filing electronically as signatures do not seem to be required at all, but I'm not sure that's proper. I expect she will want to see the return at some point, and I don't want to click some sort of box that says she agrees when she plainly doesn't.I expect married filing separately will cost me a few thousand dollars, so I'd prefer joint if I could.