My earning money on the side allows you to deduce your business expenses. This is significant ramification to have this avenue of tax deduction. But before you can use it, you need to earn money on the side first.
DISCLAIMER: I am not a tax adviser nor can I give you tax advice. These are just some pointers to clue you in on what is possible. You may not be eligible to take these deductions based on your own personal situation. Seek the advice of your professional tax adviser for more information.