https://help.gosimpletax.com/hc/en-gb/articles/360000043379-How-to-buy-a-multiple-user-account
Register at www.gosimpletax.com
Use the details of the main account holder
Go through the on boarding pages entering appropriate income
Once on the system, click on Personal Details and enter the personal details of the first user
Click on SUBSCRIBE NOW
Enter the number of additional accounts you would like to complete Tax Returns for
Click on APPLY NOW then BUY NOW
Enter your payment details payment details
*You switch between accounts using the ADD/ SWITCH USER button