The deed tax is paid only after the real estate license is issued. As far as your situation is concerned, you don't have to pay it at present.
When buying a house, you must buy a legal house with complete five certificates, otherwise it will not be protected by law.
As for the payment to overhaul fund, there is indeed such a provision. After February, all will be implemented in accordance with the new policy. However, if it has been filed before February, it can be implemented according to the old policy. Generally speaking, according to the old policy, it is more cost-effective to pay for a house with a unit price below 4800/ m2. But according to the situation of your property, you are not qualified to pay it. If you hand it in, the Housing Authority will not accept it, because your information has not been published on the Housing Authority's network. When the developer delivers the house, he must give the customer information to the Housing Authority, and then you can go to the Housing Authority to deliver the house.