How does one determine if a 1914D Lincoln cent is real or counterfeit?

I would take it to a professional appraiser.

https://coins.thefuntimesguide.com/appraising_coins/

There are a couple identifiers on the obverse of this coin that should help a novice verify it's authenticity. Anyone know them?

The 1914-D is one of the most “faked” Lincoln Cent Key Dates, and many fakes are made from 1944-D Lincoln Cents. However, a collector can learn certain details so they don’t become a victim to a sellers scam. First, notice the D mint mark on the authentic version and compare it to the fake, the D will have more of a “boxed” appearance and be angler inside the “D”. Second, near the third fold of Lincoln’s shirt where it meets his over coat, there should be a die crack connecting it to the rim. Third, a true 1914-D will not have the designer initials V.D.B. under the shoulder, the designer initials where not placed on this area of the coin until 1918.

http://coinauctionshelp.com/Coin_Help_Blog/1914-d-lincoln-cent-guide-identifyauthenticate/

This cent has cracked die imprint from rim to coat which is key authentication identifier of one of the 1914-D obverse dies used.

https://www.ngccoin.com/coin-explorer/lincoln-cents-wheat-reverse-pscid-99/1914-d-1c-ms-coinid-12471