What better way to soothe your suffering bank account after filing your taxes than by scooping up a bunch of free stuff on April 15? Celebrate tax day this year with tons of freebies, including food and some unusual services. 

Enter to win potentially a lot of pizza through the first National Pizza Return. Fill out the P-2 form (Are you single? Married, ordering separately? Jointly?) and mail it by April 18 to be entered to win a gift card to Pizza Hut for the amount of your "pizza return," which can range from $10 to $50.

Through Friday, you can get a free HydroMassage experience at participating venues. What is a HydroMassage, you ask? There's only one free way to find out. Massage enthusiasts are encouraged to call ahead of time and schedule an appointment.

Let your inner rock star shine by singing for a burger at participating Hard Rock Cafes on April 15. The fine print: You have to be 18 or older (or accompanied by a parent or guardian) and "perform a song from Hard Rock Cafe's list of designated songs on stage during the Promotion time." 

Want to shred a few pounds? With this coupon, Staples will shred up to five pounds of paper for free on tax day and through May 2. Office Depot will shred up to two pounds through April 25 -- just bring this coupon.

Certain McDonald's venues are offering a tax day deal on Big Macs and Quarter Pounders, where you can buy one and get a second for a penny.

Bonus for being an early bird: April 14, the day before tax day, is Free Cone Day at Ben & Jerry's. Get a free scoop of ice cream from noon to 8 p.m. and a chance to try the flavor Boom Chocolatta.

Looking for more deals? There are also dozens of other discounts -- not technically freebies -- at clothing stores and other retailers throughout April.