Tomorrow is the last day to earn 10% cash back on your Google Express purchase using Bank of America credit card. Just log in to your BoA account, go to Rewards & Deals -> Cash back deals and add Google Express deal, then shop on Google Express and pay with your BoA card.
From the deal:
Earn 10% cash back on your Google Express purchase, with a $14.00 cash back maximum! Offer expires 12/31/2018. Offer valid one time only. Payment must be made on or before offer expiration date. Offer not valid on third-party purchases.
Note: Offer is only valid when you pay with your eligible Bank of America® card