Assessable Spouse Question

My husband is in a PAYE role, and I haven't been working since our return to Ireland so he has been the assessable spouse.

I am now registering as self employed, but to do it online I have to make myself the assessable spouse.

I will be making a much lower amount of money than he does, so with this in mind would me being the assessable spouse be the right way to do? What implications are there to this?