Show VAT Number on Shipping Page Magento 2

I want to show VAT Number on Magento 2 Shipping Page only & that too when particular checkbox is checked.

Can someone help me in developing this.

Basically, what I want –

There will be custom checkbox. Once that is checked, VAT Number field should be shown and 1 custom attribute field should be shown. On submit, the data for both the fields should be saved in ‘sales_order’ and ‘quote_address’ table.