Step 1: Select Single Payment Request.
Step 2: Complete the payment request setup:

Tab: 1. Delivery Options

Send Payment Request To - Choose the delivery method for your payment request. This also includes the ability to Create a Web Link that can be shared across any Direct Messaging service. Click arrow at the bottom right of the page.

Tab: 2. Request Details

Reference Number - Create a customized reference number for this transaction.
Currency Converter - If required: 'Yes", select base currency, currency required and a possible conversion fee to cover yourself against currency fluctuations.
Enable a second payment link - If required: 'Yes", add a request for a deposit with the final payment and date that will auto generate a second payment link.
Amount - Enter the currency and value requested in the 0.00 format. Do not enter currency symbols
Payment Type - Select Debit to charge your customer’s card as soon as the payment is submitted.
Select Pre-Authorization - for a payment request which will put a hold for the specified amount on your customers card until you capture the payment or it lapses.
Expires in - Ignore this to leave the link expiry as open-ended, or set the number of days the payment request will remain valid. After it expires, your customer will see an error when clicking their payment request link.
Description - Describe the product or service you are selling.
Salutation - (Optional) If your custom message template contains customer tags, you may add a salutation e.g. first name and last name so that it appears in your payment request. Provide the mobile number and/or email address for the recipient.

Tab: 3. Additional Settings

Message Template - Select the message template you created on the Message Template page.
Tax Profile - If you wish to add VAT (Sales Tax), select the Tax Profile you previously created. (Under "Currency & VAT Options"). 
Shipping Information - Selecting 'Yes' will require the following information from your customer: phone number, name, country, street address, and zip code. Toggling to YES also means payment will be not be accepted until an address is entered.
Payment Options - Select 'Yes' to accept the payment forms you wish to accept.
Payment reminder - Selecting 'Yes' allows you to send payment reminders at a specified interval through your preferred payment request method. SMS rates apply where applicable.
Send MMS Invoice - Selecting 'Yes' will send a receipt to your customer in your choice of .pdf, .jpg, or .png file format.
Custom Amount - Selecting 'Yes' will still send a request for any amount you specify, but will also give the customer the option to pay any amount they choose. If you select 'No', you must specify the amount your customer must pay.
Attach Receipt on email - If email was selected for the payment request, selecting 'Yes' will attach the receipt to the email payment request.
Attach Invoice on email permits you to create or upload your own prepopulated invoice.

Select 'Message Preview' to view what your customer will see

Tab: 4. Confirmation

Review the details of your payment request. When ready, click ‘Submit’.