Can I complete my taxes today and have them filed on 13 April

You can prepare the taxes at any time, but if you want to file them at a later date you will have to go back into the account and file them at that time.

You complete your tax return by finishing all 3 Steps in the File section. In Step 3, to e-file your tax return, you must click on the large button labeled "

Transmit my returns now

Instead of transmitting your tax returns now, come back to your tax return on April 13 and transmit them then.