I'm married filing separately but still live in the same household as my spouse. I'm claiming our child as a dependent but I need to know how many allowances to put?

[DoninGA]

There are no personal allowances on a tax return.  That was removed from the tax code after tax year 2017.

[sisikwhite]

Thank you. NC Tax Witholding form requested the information.

[Hal_Al]

There's no simple way to answer that. You have to work your way through the  complicated form NC-4.