STEP 1 - CREATE AUTOREMOTE PROFILE

• Create a new Profile with an"AutoRemote" event condition (not state)
• In the message filter write "paste=:="

This will make this profile trigger every time a message that contains the text "paste=:=" arrives

• Create a new task

STEP 2 - COPY TEXT TO CLIPBOARD

• Insert a "Set Clipboard" action
• Set the clipboard text to %arcomm

%arcomm is a variable that contains the text at the right of =:= so if you receive the message "paste=:=some text", %arcomm will contain "some text". More about this here.

STEP 3 - SHOW WHAT YOU'RE PASTING

• Add a "Flash" action with the text "Pasting %arcomm"

This is just a visual way to know that the task is working correctly

STEP 4 - PASTE THE TEXT

• Add an "AutoInput Action" Tasker action
• In the "Action" field, select "Paste"
• In the "Field Type" field, select "Focus"

This will make AutoInput paste the text into whatever text field you're editing at the moment, that is, the field that has "focus".

• Accept these settings

STEP 5 - SAVE

• Back out of Tasker so everything's saved

STEP 6 - TEST

• On your PC, open your AutoRemote [joaoapps.com/autoremote/personal|personal URL].
• In the message field write "paste=:=AutoInput can paste this"
• On your Android device, open the Google Search app (or any app where you can input text)
• On your PC, click the "Send Message Now!" button

"AutoInput can paste this" should now be written in the text field you were editing on your Android device
For more information, check out the AutoInput category page.