You sure can! While this isn’t something that you can do natively in Tailwind right now, you’ll be able to add filters to your photo within Instagram’s app once it’s time to post when using the "Notification" method. Please note that this is not available when using the Auto Post method.
1) Tap to change posting method
2) Change to "Push Notification"
Now, with the "Push Notification" method, you'll get a notification on your phone when it's time to post. Tapping on that notification will bring up the Instagram app and you can select any filter for your post!
Learn more about the three methods of scheduling Posts to Instagram in our Knowledge Base article: Should I use Auto Post, SMS Notification, or iOS Notification to Post to Instagram?