New Business - Self Employed - WFF

Hi! 
I'm a mother of two, and an ECE teacher. My husband is a PhD student on full scholarship, but no taxable income. 
I'm about to become self employed, but can someone tell me please, how do you process / sort out working for families? Is it as complicated as it feels? 

I estimate how much my DH will earn in a year AND way over estimate it so we got some each week & then the rest lump sum at the end of the year. You will need to have his full accounts put through from your accountant to the IRD before you can finalise your WFF this automatically happens for everyone else around july but we've never had it done then, it'll depend on when everything is complete.

It's not that hard if you can estimate your income, if you can't then put it on lump sum.

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