https://help.gosimpletax.com/hc/en-gb/articles/115001593324-How-do-I-add-gift-aid-and-payments-to-charity-on-my-tax-return

https://help.gosimpletax.com/hc/en-gb/articles/115001593324-How-do-I-add-gift-aid-and-payments-to-charity-on-my-tax-return

To add gift aid please use the '+ new page' button and from the available pages choose 'Donations / Gift aid'   Once created and a new group called 'Donations' you can then choose the type of donation you wish to enter.