Add function to my wordpress website

my wordpress website have one calculator to calculate what user enter and it will display the product. Now i want to modify this wordpress website to(Read the attachment file for the details) 1) Save the calculator input, I need to know which customer enter what value for my calculator(bear in mind we change the field in calculator form time to time, either you provide dynamic solution or send a manual document how I should change in future) 2) Mywebsite already have registration function by Ultimate member plugin. Now i need you help to modify after customer register, go to Thank you page. (The Thank you page already done, but now after register it is not jump to the Thank you page) 3) After registration, will have a email trigger (the email already done any working). From the email, click the link it will go to system selection page(The email template already done, and it is successfully send now, but the link jump to the calculator page is not working) 4) If they click the link from the email, it will jump to the Calculator page with the value they enter before (which with the product recommendation) I will give you a file to tell you what calculation will appear what product (bear in mind we will add product in future, so please dynamic it or send me manual document tell me how I should change in future) 5) i need one page for product comparison , about same to this one [login to view URL]:11~10P64E