If you’re referring to the address on your federal income tax return, you enter or edit it like this in TurboTax Online:
- Open TurboTax Online
- Select Tax Home in the left pane
- On the Hi, let's keep working on your taxes! screen, select the dropdown on the right side of the Personal Info box, then select Continue
- On the Personal info summary screen, select Edit to the right of Mailing address
- On the Enter your current mailing address screen, you can enter your apartment number in the Apt, Ste, Unit box
- Select Continue
Don't include "Apartment" in the box. If you live in apartment 14B, simply enter "14B".
If you’re referring to a different form, provide more information.