Hi, if you purchased your computer this spring, 2019, you will not be able to claim it on your 2018 taxes (the ones you're currently working on).
For more information on qualified education expenses for next year, check out this IRS article: https://www.irs.gov/credits-deductions/individuals/qualified-ed-expenses and this TurboTax article: https://turbotax.intuit.com/tax-tips/college-and-education/can-i-deduct-my-computer-for-school-on-taxes/L6QNESb7Q.