Post registration on the eLitmus website, login to your account using your credentials (email address and password) at www.elitmus.com
Click on the tab Tests and then click on All Tests. These will show you all the available test centers and their respective dates along with the last date for applying, payment and rescheduling as shown in the screenshot below
Click on the 'Apply' button in the right most column for your preferred test date and center.
You have now reserved your spot for the pH test at the selected date and venue. However, in order to confirm the booking you need to pay the pH test fee before the last date of payment (which was highlighted before).
After you click on 'Confirm' you would be taken to the page which will prompt you to select a payment option.(Online Payment, Demand Draft or Cash)
For online payment you can use a credit/debit card or netbanking.
For payment via demand draft or cash, the instruction are highlighted when you click on the respective tabs.
A successful payment would be reflected in your account as well.
Visit 'Tests' ----> 'My Tests' in your eLitmus account and the 'Status' field would be showing as 'Paid'.
If that's the case then you have successfully booked your spot for your chosen pH test.