Angela Rayner has refused to publish the "personal tax advice" she received in relation to the sale of her house amid allegations she was liable to pay capital gains tax.
Greater Manchester Police say they are reassessing claims that the Deputy Labour leader broke electoral law over the sale of her property.
Rayner said she had been "very clear on my advice that I've received" - but confirmed she would not be putting that legal advice into the public domain.
The Deputy Labour leader is embroiled in a row over whether or not she should have been liable to pay capital gains tax when she sold a council house in 2015.
Angela Rayner has refused to publish the 'personal tax advice' she received in relation to the sale of her house
PADiscussing why she won't commit to publishing legal advice, she said: "Because I don’t need to publish all of my details.
"My child’s birth certificate was put out in the public domain and it is not fair on my family for that information to be out there. I have got that information. I will give it to the police, I will give to the HMRC," she told BBC Radio 4.
When challenged again, she replied: "Because that is my personal tax advice but I am happy to comply with the necessary authorities that want to see that.
"But I don’t think we are going down the road of MPs, whenever somebody says ‘well what is happening with your capital gains tax, we want to see all the information and detail’.
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"If we are, I am happy. If we are all going to have a level playing field… you show me yours and I’ll show you mine."
Rayner sold her home in Stockport, which she bought through the right-to-buy scheme.
She registered the former council house as her main address on the electoral register, meaning she was not liable to pay capital gains tax on the £48,000 profit.
The police had initially said that the Labour MP would not face an investigation over claims she gave false information about her primary address on the electoral roll in a statement earlier this month.
Angela Rayner sold her home in Stockport, which she bought through the right-to-buy scheme
PARayner insists there has been “no wrongdoing” and “no unlawfulness”.
"I’ve been very clear there’s no rules broken. They [the Conservatives] tried to manufacture a police investigation … I got tax advice which says there was no capital gains tax. It’s a non-story manufactured to try and smear me," she told the BBC.
Police have confirmed they are "reassessing" its initial decision not to investigate allegations made about the MPs living arrangements after receiving a complaint.