Should I declare moving expenses?I live with my parents since they had an apartment, and I helped them purchase a house which is just 5 miles away from the apartment.

No; those expenses are not deductible.   For years prior to 2018, Federal tax laws allow you to deduct your moving expenses if your relocation relates to starting a new job or a transfer to a new location for your present employer. To qualify for the deduction, your new work location must be a sufficient distance from your old home and you must begin working shortly after you arrive. Beginning in 2018, the moving expense deduction is only available to certain military personnel.