Hi, TurboTax does have box 28 for T4A slips. Box 28 on a T4A slip is used to report 'other income.' In TurboTax, you should enter the amount from box 28 in the section designated for 'Other Income.'

To do this, follow these steps in TurboTax:

1. Navigate to the section for 'Income'.
2. Select 'T-Slips' and then choose 'T4A'.
3. Enter the income from box 28 as shown in the below screenshot.