Trump was the first president in 40 years to not release his tax returns.
Ivanka could be in the sights of prosecutors.
It allegedly came amid talk of felony fraud charges against Trump's two eldest children.
He also denounced an investigation into his finances.
It comes as a grand jury convenes to decide if he or his organisation have acted illegally.
The former US Ambassador to New Zealand is in no hurry to get back into politics.
"Other things may be coming down the pipeline."
Twitter de-platformed Trump earlier this year.
