Sign and date the forms.
The IRS won’t accept them unless your John Hancock is there, along with that of your spouse, if you’re filing together.
Now that you've filed, there's just a couple of things left to do. Using your MegaTank PIXMA G7020, print out your latest finalized tax forms, along with any documentation that goes along with them, like those charitable receipts, tax forms, mileage logs, etc. Print a label for 2018 taxes, and create a folder to store it all in. File it in a safe place, in case you need it in the future. While you're at it, create another folder for 2019 taxes and add documentation to it as the year goes by. That way, you'll be ahead of the game when tax season rolls around again.