If the “Auto-Correction” switch is already grey, autocorrect is already turned off. You might also want to turn off the “Check Spelling” feature by tapping the green switch next to this heading as well.
On a Samsung Galaxy, you’ll instead scroll down to tap General management.
You’ll tap On-screen keyboard if you have a Samsung Galaxy smartphone or tablet.
For example, a Samsung Galaxy user will tap Samsung Keyboard here. If you use Gboard, you can tap Gboard here instead.
On a Samsung Galaxy, tap Smart typing here instead (unless you selected Gboard, in which case you’ll tap Text correction).
If this switch is grey, autocorrect is already disabled on your Android. While you’re here, you might also want to turn off the “Show correction suggestions” feature in this menu. On a Samsung Galaxy’s default keyboard, you’ll tap the blue “Predictive text” switch here.
If this switch has “Off” next to it, autocorrect is not enabled on your computer. You might also want to turn off the “Highlight misspelled words” feature in this menu by clicking its “On” switch.
You might also want to uncheck the “Capitalize words automatically” box here.