TAX ?

“A Enter ?1? for yourself if no one else can claim you as a dependent”

I was told i should file Married/single rate and 0 to avoid owing taxes next year. If i enter 1 for line A i obviously wont be able to file M and 0 i would be M and 1. Is it ok to write 0 in line A no one else can claim me as a dependent?

thanks for reading my non tech post