If I bought a laptop in 2017 for a business I since left & recently filed a new business (same industry) in 2018, should the asset be considered used from 2017, or 2018?

I bought a laptop I used for business purposes in August of 2017. 

I left that company. 

I filed a new company in the same industry on August 15, 2018. (a little over one year later.)

I am still using the same laptop, and have been since buying it in 2017. This laptop helped me start the new company.

In the Deductions section, it asks:

"When did you buy this asset (or start using it for business?)"

The examples given are a little confusing as to whether I should choose 2017 or 2018 for my circumstances.