Hello Aspirant,
See as per the information brochure one should use class 10th passing certificate in NEET UG application form so you should only upload the passing certificate not any provisional certificate. 

Complete NEET UG 2022 Application process is explained below in very easy steps :-
** Very first step is to visit the official website as given above and click on "New registration" button.
** Then you have to do registration using your basic details such as name, father's name, mother's name, contact details and so on.
** Now on second menu item you will have to fill details like your academic performance, address, ID type, medium of question paper and so on.
** Then on Next menu item you have to upload some images such as :-
i. >>>>>>> The recent photograph should be either in colour or black and white with 80% face (without mask) visible including ears against a white background.
ii. >>>>>>> Scanned photographs, signature, and Left and Right hand Fingers and Thumb impression should be in JPG format (clearly legible).
iii. >>>>>>> Scanned Category Certificate (if applicable), Citizenship Certificate (if applicable), and PwD Certificate (wherever applicable) should be in pdf format (clearly legible).
iv. >>>>>>> The size of the scanned passport photograph should be between 10 kb to 200 kb (clearly legible).
v. >>>>>>> The size of the scanned Postcard photograph (4”x6”) should be between 10 kb - 200 kb (clearly legible).
vi. >>>>>>> The size of the scanned signature should be between 4 kb to 30 kb (clearly legible)
vii. >>>>>>> The size of scanned and Left and Right hand Fingers and Thumb impressions as per the Template provided (Appendix-XXIV) should be between 10 kb to 200 kb. 
viii. >>>>>>> The size of the scanned copy of the Category certificate (SC/ST/OBC/EWS etc.) should be in pdf between 50kb to 300kb (clearly legible).
ix. >>>>>>> The size of the scanned copy of the PwD certificate should be between 50 kb to 300 kb (clearly legible) 
x. >>>>>>> The size of the scanned copy of Class 10 pass certificate should be between 50 kb to 300 kb(clearly legible).
xi. >>>>>>> The size of the scanned copy of the Citizenship Certificate/Embassy certificate or any Documentary proof of Citizenship certificate should be between 50 kb to 300 kb (clearly legible).
** Then you have to proceed for payment of application fee which can be done only in online mode either through Credit/Debit card or UPI or NEFT/RTGS.
** Then after you have to take the print-out of the NEET Acknowledgement receipt.

>>>>>>> Application fee for NEET UG 2022 :-

General :- 1600/-
General-EWS/OBC-NCL :- 1500/-
SC/ST/PwBD/Third Gender :- 900/-

To get live updates and complete details about NEET UG application kindly visit the link given below :-
https://medicine.careers360.com/articles/neet-application-form

You can also solve the Test series for NEET UG 2022 for better finishing of your preparation, you can get the Test series from the link given below :-
https://learn.careers360.com/test-series-neet-may/

I hope this information helps you.
Good Luck!!