Getting there

#Imports
import tkinter
from tkinter import filedialog
from tkinter import *
import json

window = tkinter.Tk()
window.title("Employee Time Sheet")
window.geometry("1280x820")
window.wm_iconbitmap('file.ico')
window.configure(background='#fcf9f0')




#Labels
titleLbl = tkinter.Label(window, text='RKT Employee Time Sheet',font=(None,16),height=3,background='#fcf9f0')
titleLbl.grid(row=0, columnspan=8)

employeeLbl = tkinter.Label(window, text = 'Employee:', height=3,font=(None,12),background= '#fcf9f0')
employeeLbl.grid(row=1,column=0,padx=1)

companyLbl = tkinter.Label(window, text = 'Company',background='#fcf9f0', relief=RAISED)
companyLbl.grid(row=2, column=0,padx=1, ipadx=33)

leaseLbl = tkinter.Label(window, text = 'Lease',background='#fcf9f0',relief=RAISED)
leaseLbl.grid(row=2, column=1,padx=1,ipadx=45)

propLbl = tkinter.Label(window, text = 'Porperty Number', background= '#fcf9f0',relief=RAISED)
propLbl.grid(row=2, column=2,padx=1,ipadx=13)


wonLbl = tkinter.Label(window, text = 'Work Order Number',background='#fcf9f0',relief=RAISED)
wonLbl.grid(row=2, column=3,padx=1,ipadx=5)

dateLbl = tkinter.Label(window, text = 'Date',background='#fcf9f0',relief=RAISED)
dateLbl.grid(row=2, column=4,padx=1,ipadx=46)

tiLbl = tkinter.Label(window, text = 'Time In',background='#fcf9f0',relief=RAISED)
tiLbl.grid(row=2, column=5,padx=1,ipadx=37)

toLbl = tkinter.Label(window, text = 'Time Out',background='#fcf9f0',relief=RAISED)
toLbl.grid(row=2, column=6,padx=1,ipadx=34)


mileageLbl = tkinter.Label(window, text = 'Mileage',background='#fcf9f0',relief=RAISED)
mileageLbl.grid(row=2, column=7,padx=1,ipadx=36)


#Entrys

#EMPLOYEE
employeeEnt = tkinter.Entry()
employeeEnt.grid(row=1,column=1,padx=1,pady=2)

#Rest of Entrys

def generate_rows(entry_names, amount):
    data = {}
    for x in range(1, amount):
      r = x+2
      for col, name in enumerate(entry_names):
        ent = tkinter.Entry()
        ent.grid(row=r, column=col, pady=2)
        data[name+str(x)] = ent
    return data

entry_names = (
  'ent_company', 'ent_lease',
  'ent_property', 'ent_won',
  'ent_date', 'ent_timein',
  'ent_timeout', 'ent_mileage'
)
data = generate_rows(entry_names, 20)

json_data = { key: value.get() for key, value in data.items()}

class fileManagement:

    def save():

        window.withdraw()
        win2 = Toplevel()
        win2.title("Save as...")
        win2.configure(background='#fcf9f0')

        win2Lbl= Label(win2, text = "File Name:",background='#fcf9f0')
        win2Lbl.grid(row = 0, column = 0)

        win2Ent = tkinter.Entry(win2)
        win2Ent.grid(row=0,column = 1, sticky=NSEW)
        win2.geometry("250x200")


        def OkPressed():

            with open(f'{win2Ent.get()}.json', 'w+') as file:
                    json.dump(data, file, indent=4)
            win2.destroy()
            window.deiconify()

        win2B = Button(win2, text = "OK", command = OkPressed)
        win2B.grid(row=1, column = 1, sticky=NSEW)



    def load():

        selectedFile = filedialog.askopenfilename(initialdir = "C:/" , title = "Select file", filetypes = (("JSON File", "*.json"),("All Files","*.*")))

        with open(f'{selectedFile}', 'r') as file:
            data = json.load(file)

        for employee in data:
            employeeEnt.delete(0,'end')
            employeeEnt.insert(0, data [employee])

        for company in data:
            companyEnt2.delete(0, 'end')
            companyEnt2.insert(0, data [company])
#Buttons

copyB = Button(window, text = "Load", command = fileManagement.load)
copyB.grid(row=0,column=9, sticky=E)

saveB = Button(window, text = "Save", command = fileManagement.save)
saveB.grid(row=1,column=10, sticky=E)



window.mainloop()