Is it too late to change my payment from a paper check to a GreenDot card

If you have already filed it is too late to update this information. If have not already filed you can update it. 

Follow the instructions below to change your refund method. 

1. Open your return in TurboTax. 

2. Go to the File section in the left menu. 

3. Next to Step 2: Your refund info select Revisit. 

4. Choose your desired refund method and select Continue.